Answer - D. Were in Search for food to eat.
Reasoning - As ice age and resistant of water became changing in ponds and lake the resource of food started to deplete so evolution became a evolving for creatures aka reptiles.
Three percent is freshwater found in glaciers and ice, below the ground, or in rivers and lakes.
The parents are heterozygous, meaning that each parent carries both a dominant and a recessive fur gene. The dominant gene makes them phenotypically express brown fur, but allows them to pass on the recessive gene to their offspring.
Bile helps with digestion