PL I NEED HELP Which is an adaptation that helps birds maintain a stable body temperature? A. air sacs connected to lungs B. large chest muscles C. down feathers D. nearly hollow bones

c

Explanation:

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I thinks it‘s the feathers

Explanation:

Bc feathers are warm and the hollow bones are to make the bird lighter so it can fly, the chest muscles don’t make heat, and the air sacs are probably for storing air

explanation: in any substance/object, the particles inside it (atoms/molecules) constantly move in random directions and with random speeds (this motion is called brownian motion). as a result, the particles have some kinetic energy (which is proportional to the temperature of the substance).

explanation:

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15.3 cos 65 degrees trig