Consider this animal cell. which organelle is responsible for producing the energy for cellular processes?

The mitochondria is the key player in the animal cell energy production because it has no other element as important to that function.

Explanation:

The mitochondria are present in both animal and plant cells, nevertheless, the plant cells also have chloroplasts that are the major factor in the creation of the energy in the plant cell. Meanwhile, the animal cell has no presence of chloroplasts and they only rely on the mitochondria to carry on their energy-related activities. Therefore the mitochondria are considered the major energy function contributor in the animal cell.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;