Its A, blood circulates the hormones
Biomass is plant or animal material used as fuel to produce electricity or heat. Therefore i think the answer is plants!
Answer: The GCF is 4
Explanation: The factors of 52 are 52, 26, 13, 4, 2, 1. The factors of 92 are 92, 46, 23, 4, 2, 1. So the GCF is 4.