The third level of cell organization is the
tissue level
system level
organism level
organ level

system level i believe

Explanation:

Hope this helps :)

a. as the temperature increases, the kinetic energy of the gas molecules increases & the molecules move faster & further away from each other.

b. if you decrease the temperature of a fixed amount of gas at constant pressure, the combined gas law reduces to charles's law. in this case, volume will also decrease.