Explanation:

- Cornucopia: A symbol of plenty; a large amount of something or an abundance of goods.

- Option 1: Sink hole - A cavity in the ground, especially in limestone bedrock, caused by water erosion and providing a route for surface water to disappear underground. Not related to abundance.

- Option 2: Treasure trove - Discoveries of valuable things. Often associated with abundance, making it synonymous with cornucopia.

- Option 3: Malaise - A general feeling of discomfort, illness, or unease whose exact cause is difficult to identify. Opposite of abundance.

- Option 4: Avarice - Greed for wealth or material gain. Does not imply abundance but rather a desire for more.