Answer:
a) and d)
Step-by-step explanation:
An homeostatic process is the process that allows the body to reach and maintain an state of equilibrium, this process allows the body to self-regulate itself and therefore when it detects that some parameters are out of range, it works to get those parameters back to where they are supposed to be.
Therefore, the definition of a homeostatic process contains two basic statements:
a) The maintenance of certain body variables within a fixed range.
d) The process that reduces the deviations from the set point.