AP environmental science.

I really need help with these 2 questions.

Among the following environmental factors, which does not have a long-term impact on the composition of a region's soil? a. kinds of crops grown b. types of fungi present c. topography of the landscape d. variety of species of mammals e. number of freezes occurring annually

Identify one similarity between china and europe that explains their decisions on wether to explore or conquer lands around the indian ocean

Along with removing drugs from the body, the kidneys also a. balance ph levels b. release hormones that regulate blood pressure c. release hormones into the stomach d. a and b