Which of the following types of organisms uses hydrogen sulfide for reducing power?

purple sulfur bacteria
algae
prochlorophytes
heliobacteria
cyanobacteria

a. the production of carbon dioxide through the process of photosynthesis

the correct answers are;

a. the rock was made from more than one type of material.

e. layers of hot liquids in the rock cooled and solidified at different temperatures.

these are the two options that are related to the statement given above.

the answer is c. have a great day; )