How do humans get phosphorus from the environment?

A) precipitation
B) evaporation
C) mining
D) agriculture

C

Explanation:

phosphorus is considered as a material which could be found underground and can be harvested by mining

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

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.