Ascientist is observing a worm that was found inside a host. the worm that's an outer body that is smooth and soft. which worm is the scientist least likely to be observing. an earthworm, a pinworm, a hookworm or a tapeworm

The answer is the earthworm

Explanation:

Since the scientist is observing a worm that was found inside a host, and worms are not parasites, nor do they need a host to live. On the contrary, earthworms require living in a moist soil that has organic matter. Earthworms starting the organic particles found in the earth that swallows and then expels them forming a pile of excrement. Earthworms are hermaphroditic, and lay their eggs in moist soil.

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in