a certain grey squirrel population has lived in tomlinson run state park, west virginia, for more than 20 years. a red squirrel population was introduced into the park two years ago and has become a large competitor for food and other resources for the grey squirrel. there has also been a decline in the park’s grey squirrel population during the last two years. which of the following best explains this scenario?
a) commensalism
b) gause’s law
c) mutualism
d) boyle’s law