Apopulation of frogs inhabits a lake. if the resource availability of the lake changes, the population may to use the resources that are available. as a result, the population would exhibit .

Resources in a lake can change due to climate changes. Changes in climate may affect the survival, growth and reproduction capabilities of frogs and other amphibians. Climate changes greatly influence food availability, predator-prey relationships and competitive interactions which can alter community structure.

Changes in lakes can include other factors such as UV-B radiation and contaminants.These factors are complex and are causing some amphibian population to decline or even extinct.

Hence, as a result the frog population could exhibit a decline in population.

well, i believe that the answer is 2. : 3