Answer:
a: solution 2 is more diluted
Explanation:
I believe another term for Natural Selection, based off of the answers provided, I would say C, Survival of the Fittest.
I think the answer is skin. Skin contains sweat glands which secrete a fluid waste called sweat or perspiration; nonetheless, its primary functions are temperature control and release of pheromone. Its role as a part of the excretory is therefore minimal. Additionally, sweating also maintains the levels of salt in the body.
Connected to the occipital bones
