  Jockey is a person who rides horses in races, often professionally.

  Mediator (B) is a person who resolves conflicts, not a horse rider.

  Bronco (C) refers to a type of horse, especially one that is untrained.

               Equine (D) refers to anything related to horses, but not a person who rides them in races.

  Hawker is a person who travels around selling goods, often in public spaces.

  Precarious (A) refers to something dangerous or uncertain, not a person.

  Gourmet (C) refers to a person who enjoys fine food, not related to selling articles.

               Pedestrian (D) refers to a person walking, not someone who sells goods.

  Oasis is a fertile area in a desert or arid region, often containing water.

  Barren (A) refers to land that is unable to support plant life, opposite of an oasis.

  Dune (C) is a mound or ridge of sand, not fertile land.

  Flora (D) refers to plant life in general, not specific to an arid region.

  Florist is a person who sells flowers and floral arrangements.

  Nosegay (B) refers to a small bouquet of flowers.

  Nubile (C) refers to a young woman who is ready for marriage, unrelated to flowers.

               Fallacious (D) refers to something misleading or incorrect, not related to flowers.

  Fishmonger is a person who sells fish.

  Fisherman (A) catches fish, but does not necessarily sell them.

  Aquatic (B) refers to something related to water, not a person.

  Shoal (D) refers to a large group of fish or a shallow area in water.

  Fog is a type of cloud that forms near the ground, reducing visibility.

  Horizon (A) is the line where the earth and the sky seem to meet, not a cloud.

  Landscape (B) refers to the visible features of an area, such as mountains, rivers, and vegetation.

               Ornate (C) means elaborately decorated, not related to clouds.

  Drover is a person who moves cattle or livestock from one place to another, often over long distances.

  Grocer (A) deals with food and groceries, not cattle.

  Merchant (B) refers to a person involved in trade or commerce in general.

  Shepherd (D) cares for sheep, not cattle.

  Druggist refers to a person who sells medicines and other pharmaceutical products, also known as a pharmacist.

  Peddler (B) refers to someone who sells goods, often in an informal or street context.

  Pharmacist (C) is a person who dispenses medications, but "druggist" is often used interchangeably in some contexts.

  Ornithologist (D) is someone who studies birds, not involved in selling drugs.

  Monastic refers to a person who lives under the rules of a monastic order, often in a religious context, like monks or nuns.

  Theist (B) refers to someone who believes in God, but not necessarily living under a religious rule.

  Gipsy (C) refers to a nomadic group of people, not someone under religious rule.

  Priest (D) is a religious leader but not specifically someone living under a religious rule.

  Sculptor is a person who carves or shapes materials, often stone, to create art.

  Mason (A) works with stone but typically focuses on construction, not carving art.

  Potter (C) works with clay, not stone.

  Arbiter (D) refers to a judge or mediator, not a person who carves stone.