(A) Lemming population is dependent on the number of stoats.B) A decrease in lemmings has no affects on the population size of stoats.As lemmings increase in population, so do stoats.(D) The stoat population is dependent on the number of lemmings.E) The above interaction is an example of commensalism. 10Lemmingpopulation0.11.0.10.001Stoat0.01population0.0000119881990199219941996199820002002YearLemmings per 2.5 acres10Lemmings' winter nestsoccupied by stoatsper 2.5 acres

A stoat is a small mammal related to the weasel and otters. It is found in the Eurasian and North American regions. A lemming is a small rodent mammal. In regions where these two animals are present together, the stoats specifically prey on the lemmings forming a predator-prey relationship.The graph shown in the question is a typical predator-prey relationship graph. The increase in the number of the prey results in increase in number of the predator after some time period. The peak in prey population is followed by the peak in predator population with some time lag. Increase in the predator population results in decreased prey population. This decrease in prey population causes decrease in number of predators, and the cycle continues until something disturbs the balance between their populations. Thus both the populations are dependent on each other. So, both lemming and stoat populations depend on each other and increase in number of lemmings will lead to increase in number of stoats. So, statements A, C and D are correct. Lemmings are prey to stoats. So, a decrease in the number of lemmings will affect the number of stoats. So, statement B is incorrect. Commensalism is an interaction where one of the organisms is benefitted from the relationship, while the other is not affected by the relationship. But, here stoats are benefitting and lemmings are being harmed. So, option E is also incorrect.The correct statements are : A. Lemming population is dependent on the number of stoats. C. As the lemmings increase in population, so do stoats. D. The stoat population is dependent on the number of lemmings.