How can you help prevent water pollution? a. Don't use weed killer in the yard
b. Don't put grease in the kitchen drain
C. Use less clean water
d. All of the above

The answer is B or all of the above

Centration is the correct answer

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.