The strength of a gravitational force between two objects depends on

It depends on their masses, and the distance between them.

Explanation:

According to Newton's Law of Universal Gravitation, every particle in the universe attracts any other particle with a strength that is directly proportional to the product of its masses and inversely proportional to the square of the distance between them. Mathematically it is expressed as:

Where:

reserve is the answer

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.