When water in a lake freezes, the ice that forms floats on top of any water that is still liquid. Why does the ice float? A. Ice is less dense than liquid water, so it floats.
B. Air bubbles trapped in the ice cause the ice to float.
C. Ice crystals are polar, and they float on top of non-polar water.
D. The ice forms at the top of the water, so it stays there and floats.

A. Ice is less dense than liquid water, so it floats.

Explanation:

In fact, ice is around 9 percent less dense than water. As the water gets thicker, the lighter ice moves, allowing the ice to rise to the surface.

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.