Question

20 which sustainable practice involves structures built in water to trap fish?

a. the practice of three sisters agriculture

b. growing maize as a central crop

c. constructing fish weirs for fishing purposes

d. organizing seasonal cultural festivals

Explanation:

• Option a: Three Sisters Agriculture is a farming method with corn, beans, and squash, not related to trapping fish in water.
• Option b: Growing maize is a crop - growing activity, not about trapping fish in water.
• Option c: Fish weirs are structures built in water (like rivers) to trap fish, which matches the description of the sustainable practice in the question.
• Option d: Organizing cultural festivals has nothing to do with building structures in water to trap fish.

Answer:

c. Constructing fish weirs for fishing purposes