Plants, people, and flatworms share a common characteristic. identify that characteristics from the choices blow.

a) they all use cellular respiration to obtain energy.
b) they all make their own food.
c) they all use photosynthesis to obtain energy.
d) they all ingest food.

The correct answer is option A.

Explanation:

Cellular respiration uses food to create ATP fuel which is used for energy by the cells. Generally, during this process utilize the oxygen that is referred to as aerobic respiration.

It has 4 different phases known as glycolysis, Link reaction, the citric acid cycle, and the e⁻  transport chain.

It is the process that common in plants, people and flatworms to obtain energy.

Thus, the correct answer is option A.

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.  

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: