Question

Q9. Explain the following.

a) The use of oil reduces friction between two surfaces in contact with each other.

b) The role played by microorganisms in cleaning the environment.

c) Solar system with the help of a diagram.

Answer 1

hey o don't explain now

Answer 2

Answer:

microorganisms are help in cleaning the environment by decompose the wastes of kitchen and plant residues and the excretion of plants and animals