Are essential to recycling life materials because without them matter would pile up rather than recycle.

The given blank can be filled with decomposers.

Explanation:

The species that are placed at the level of decomposer in a biome plays an important part for the life on Earth. The decomposers dissociate dead animal and plant matter, due to which the nutrients in them gets recycled back into the ecosystem so that it can get used again.  

Fungi, mainly in the forests are the prime decomposers. One of their essential activity is to assists in discharging phosphorus and nitrogen from the dead and decaying matter. Other species are known as detritivores, like some of the insects, earthworms, woodlice, and sea cucumber also dissociate the dead matter, and however, they need to engulf it first unlike fungi, which uses biological and chemical procedures.  

yes it is   dangerous

explanation:

because that foot is discusting and could get you sick

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.