Wolves are a keystone species because they are a. at the top of the food chain b. are physically the largest animal in the food chain c. so important to the ecosystem that their removal causes a catastrophic disequilibrium d. often found in the geographic center of an ecosystem your answer would be c.

because the asteroid belt is between the mars and jupiter orbits, it is around 2.2 to 3.2 astronomical units (au) from the sun – which is approximately 329,115,316 to 478,713,186 km. the average distance between objects is a massive 600,000 miles.

explanation:

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.