Which types of organisms are most likely to survive change in an ecosystem, those that have a narrow ecological niche or those that have a broad niche?

The answer is obviously the organism with broad niche.

Explanation:

Organisms can have a broad niche or a narrow ecological niche. This can be explained as follows: If an organism has adapted itself to wide range of environmental conditions then it can survive changes in an ecosystem, hence it has a broad niche. Some organism adapt to only specific environmental conditions and cannot survive if it changes, such organisms are said to have narrow niche.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

a symbiotic relationship with the mitochondria