Which of the following is the most accurate description of gravity?

a. objects fall unless they are supported.
b. forces that keep us on the ground and from floating into outer space.
c. a natural force of attraction exerted by the earth upon onjects that pulls the objects towards earth's center.
d. any force that pulls one object into another object.

C. A Natural force of attraction exerted by the earth upon objects that pulls the objects towards earth's center.

bc blah

explanation:

bc blah

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".