PLAAASE HELP The Gila woodpecker lives in the deserts of the southwestern United States. This bird eats insects that damage the saguaro, a common type of cactus. The bird pecks at the cactus to remove the insects. As it pecks, it removes damaged cactus tissue. It also makes a nesting cavity for itself. The nesting cavity does not negatively affect the saguaro. Any nesting cavity not being used by woodpeckers is available for use by lizards, rodents, and other birds. Name examples of predation, mutualism, and commensalism that involve the Gila woodpecker. a. Why would the Gila woodpecker be considered a keystone species in its ecosystem?
b. Name examples of predation, mutualism, and commensalism that involve the Gila woodpecker.
c. What is one way a desert ecosystem would be affected if climate change were to cause a decrease in the Gila woodpecker population?

tucson.com helped me a lot but if you don't like that advice here: The Gila woodpecker is a medium-sized woodpecker of the desert regions of the southwestern United States and western Mexico. In the U.S., they range through southeastern California, southern Nevada, Arizona, and New Mexico.

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as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.