Answer:
You become infected after swallowing the parasite. Cryptosporidium may be found in soil, food, water, or surfaces that have been contaminated with the feces from infected humans or animals. Crypto is not spread by contact with blood.
Population density is the characteristics of a population increase with plentiful of resources. Population density is the measurement of every person in the population per unit area or unit volume. It is applied to a living organism and most of the time on humans. It is also the number of people living in each unit of area such as a square mile.
Because to actually use the word evolve an organism must suffice more than one condition, which in this case would be an advantageous trait. Having an advantageous trait (from our eyes at least) must also include the right and stimulating enviironment for procreation. So this answer is multifolded.
I think B is the correct answer. Answer choices C & D are about dolphins, but they do not have anything related to negative effects surrounding human and dolphin interaction. A, on the other hand, may seem like a good choice, but then again, the answer is too vague.
The muscular system contributes to maintaining homeostasis by working with other body systems to regulate body temperature and dilate or constrict blood vessels close to the skin's surface, according to OpenCurriculum. The muscular, nervous, cardiovascular, endocrine and integumentary systems work together to cause sweating and shivering in the body, which contribute to homeostasis.
