Can I get help for question number 2 and 3 pls ASAP

Asap! how does the distance between two objects affect the force of gravity? how is the moon dependent on the sun?

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming