pick from the following.
(1). sunlight.
(2). fungus.
(3). bread.
(4). salmon.
(5). fungi.
(6). dust.
(7). plants.
(8). edible.

Fact 1: Humans have collected and grown mushrooms for food for thousands of years. Fact 2: Mushrooms are also fungi. Given the two facts above, what have humans have collected and grown for food for thousands of years?
Answer:
(5).