Answer:
O A. As nutrients increase, the number of life-forms increases.
Explanation:
common sense
There are 4 electrons altogether shared between carbon atoms in a molecule of C2H4, to be more precise there are 2 electron pairs shared between the carbon atoms.
Groundwater is the largest available source of freshwater, followed by lakes, rivers, reservoirs and wetlands. Groundwater refers to all subsurface water.
Chirping, if that's what you mean.
