It would be your third option. because if you look at the reproductive system both the sperm and the egg carry different amounts of genetic information.
They are often targets because they don't fight back, they often provoke their aggressor.
Answer:
The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system. Blood provides the body with oxygen and nutrients, as well as assisting in the removal of metabolic wastes. In humans, the heart is located between the lungs, in the middle compartment of the chest.
