What is the key difference between a liquid and a gas?
a. intermolecular attractions
c. average kinetic energy
b. the ability to flow
d. the motion of their particles

Inter-molecular attractions

Explanation:

The source of all properties that differ between a solid and liquid depends on how strongly the molecules are held together.

In solids the Inter-molecular forces of attractions are stronger and rigid than those found in liquid

Due to this the average kinetic energy, ability to flow, and motion of particles differ between solids and liquids.

1 a

2 b

3 b

4 d

5 d

6 d

explanation:

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.