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:

trust

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

the answer is 2 electrons

Explanation:

The oxygen atom has atomic number 8, therefore its electronic configuration is

         1s² 2s² 2p⁴

the sublevel s has a capacity for 2 electrons so it is full

the sublevel p has capacity for 6 electrons, as in this atom it has only 4 electrons it needs two (2) more electrons to have its full capacity and to achieve maximum stability.

Consequently the answer is 2 electrons