Will mark brainliest timed test
eyan is giving a seminar on environmental conservation efforts in a local factory. which qualities is eyan using when writing and presenting his seminar?
a. leadership, supervising, and teaching skills
b. critical-thinking skills and knowledge of environmental regulations
c. communication skills and physical strength
d. knowledge of machines and responsibility in operating heavy equipment

critical-thinking skills and knowledge of environmental regulations-b.

the answer is a or when it says crossing over

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.