C. Decreased death rate is the answer
<span>as animals get separated from each other, they soon start to adapt to the new environments which is called speciation</span>
Due to the bad trophic efficiency transfer, there is a loss in the consumption of most energy to cellular respiration at trophic levels. It also loses energy to heat, metabolism and other subsistence for biomass production. There is a higher energy loss when it is at higher trophic levels.
Ok I think its small polar molecules but I could be wrong.