Fact 1: Humans have collected and grown mushrooms for food for thousands of years.

Fact 2: Porcini mushrooms are earthy, musky, sexy food.

Given the two facts above, answer the question "what have humans collected and grown for thousands of years?" with the following options: 
- computers
 - h2o
 - orchids
 - stamps
 - seeds
 - trees
 - ferns
 - porcinis


 

        porcinis 