Question

how does the construction of dams positively affect natural resources?
by providing water for irrigation and restoring trees to areas where forests once existed
by creating reservoirs, preventing flooding, and renewing destroyed ecosystems
by preventing flooding, creating reservoirs, and providing water for irrigation
by renewing destroyed ecosystems and restoring trees to areas where forest once existed

Explanation:

Dams create reservoirs that store water, which can be used for irrigation. They also help in preventing flooding by controlling the flow of water.

Answer:

by preventing flooding, creating reservoirs, and providing water for irrigation