Answer:
C
Explanation:
a difference in the pH of an environment changes enzymes activity
When acid rain falls, aquatic animals get affected due to the spreading of acid rain which harms and destroy wildlife, it can reach to aluminum and then to soil, which basically destroys the ecosystem of the aquatic animals.
The greenhouse effect is a natural process traps heat in the atmosphere - global warming tends to be when additional greenhouse gases are released into the atmosphere and this causes a warming event.
Valve created by soft palate keeps food out of nasal airway during swallowing
1. to restore dying cells 2. to repair damaged cells 3. to reproduce
