Question

In which two ways does a hummingbird's nervous system help its body's cells get nutrients?

Answer 1

I think it’s D it sound a the most reasonable answer.

Answer 2

I think it's D) because I found this fact.

Loss of significant amounts of body fat will compromise an individual's ability to conserve heat. Endotherms use their circulatory systems to help maintain body temperature. Vasodilation brings more blood and heat to the body surface, facilitating radiation and evaporative heat loss, which helps to cool the body.