Hope this helps you: Ecology is the study of how organisms interact with their environment<span>, including both abiotic (non-living) and biotic (living) aspects of the </span>environment<span>. It is a very broad definition and the science of ecology tends to overlap other biological sciences.</span>
It’s the second one because the order of it is used as the exponent for it in the rate law equation
Nothing is less dense than gas. gas is the least dense form of matter.
