Homeotherms: elevate their body temperature and maintain it within a defined range. elevate their body above the ambient temperature. allow their body temperature to fluctuate with the ambient temperature. maintain their body temperature at the average ambient temperature.

Contraception refers to the use of means to prevent sexual intercourse resulting in pregnancy. It is defined by the World Health Organization as "the use of agents, devices, methods or procedures to reduce the likelihood of conception or avoid it".

The right answer is:

a. this is the most effective method. it is the only way to ensure that pregnancy won't happen

==> abstinence

B. this contraceptive is a plastic cup that is inserted before sexual activity

==> diaphragm

c. this method involves a vasectomy in males and a tubal ligation in females

==> sterilization

d. this contraceptive is inserted under the skin of a women's upper, inner arm. ==> implant