Living things get rid of wasted by the process of

While the answer of this could be decomposition, the general breakdown of organic material into it's component parts, this could also be when during metabolic processes, an organism generates heat, which is radiated away and the energy of which is essentially "wasted", not serving any process.

Hope this helped :)

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.