Pls help me with this question

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

What is responsible for the uneven heating between the poles and the equator on any given day

The dense layer of connective tissue that surrounds an entire skeletal muscle is the