Which of the following is an r-selected species?
select one:
a. rat
b. humpback whale
c. eagle
d. elephant

The correct answer is A) Rat.

r- selected species are those, which are capable of producing large number of small offsprings in an unstable environments. These species follow exponential growth rate, does not survive to childhood ( as possess very short life span), and have no parental care.

On the contrary, k selected species are present in a stable environment, have low reproductive rate, long life span, and possess parental care. Whale, Eagle, and Elephant are the example of K- selected species.

Thus, rat is an example of r- selected species.

The correct answer is RATS.        

r-selected species have a high growth rate and produce many offspring. These offspring may or may not reach until adulthood. Other examples of r-selected species are - mice, rabbits, weeds and bacteria, which have a lot of offspring, but a short life expectancy.                

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.