Which best represents surface water in a watershed?

1. Ground water
2. Rivers and lakes
3. Underground springs
4.impermeable rock layers

rivers and lakes

Explanation:

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.