Why do you think plastic is a good choice for kayak material?

It depends on what way your viewing it, but i will assume its an engineering standpoint.

Explanation:

Plastic is light, and for what it is very strong. It also floats in water, and can easily be molded into any shape. With a kayak for example, plastic is great because it is sturdy yet flexible, and makes it light weight.

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.

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