Thirst shows an animal that it needs what?
CO2 H2O He food feed urea O2 H20
A B C D E F G H
An example is H2O which shows water is made of two atoms of hydrogen stuck to one atom of oxygen.
thirst is used to make an animal realize that it needs to replenish H2O in its body.
Thirst shows an animal that it needs what? (A) CO2 (B) H2O (C) He (D) food (E) feed (F) urea (G) O2 (H) H20