Which systems have the most influence on behavior? select all that apply.
endocrine
respiratory
circulatory
integumentary
nervous

The correct answer would be endocrine and nervous system.

The endocrine and nervous system together influence most of the aspects of human behavior including metabolism, growth, and reproduction.

Humans have developed desires, drives, emotions, and ability to learn and remember. These characteristics feature mainly depend on the brain (part of the nervous system).

However, the hypothalamus along with pituitary gland (endocrine system) also control and coordinate the homeostasis, social behavior, and emotions of an individual.

For example:

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.

the answer to your question is slate