Air circulates in Earth's atmosphere. What is the fundamental cause of air circulation in

Earth's atmosphere?

a. ocean currents

b. energy from the sun

d. earth’s magnetic field

i have to have where i found the answer on, so if you have the hmh sixth grade book it will help.

The human body maintains a temperature of around 98.6 degrees at all times. enzymes are involved in almost every chemical reaction in the body. which of the following describes the connection between these two statements? a. enzymes function best at a specific temperature. b. the body needs to be warm to prevent hypothermia. c. the body is kept relatively warm to prevent too much enzyme action. d. there is no connection between the two statements.