The correct option is C.
Climate is a very important factors in the lives of all living organisms, because it is one of the major factors that determine if a living organism is going to survive or not. Climate change is said to occur when there are changes in the earth's climate system, which result in formation of new weather patterns that last for a long time.
Climate change affect living organisms in different ways; while climate change is beneficial to some organisms, it is detrimental to some. For instance, in Europe climate change (increase in temperature) has been found to have positive effects on some birds populations.