Which tissue performs peristalsis to move substances such as food through the hollow organs of the body?

The answer is simple columnar epithelial tissue because of it's long structure, ability to move and stretch to move the bolus (chewed food) down the intestinal tract.

An autotrophic protist - they can perform photosynthesis and mainly consist of unicellular algae. they can be divided into number of systematic group according to the shape of their cell and the type of photosynthetic pigments they use.

I’m not exactly sure what your trying to ask, but if it’s how an organelle is similar to a body system or a part a nucleus is like a in function. but i don’t fully understand what you’re trying to ask