What do feathers, fur, overcoats, and whale blubber all have in common? A. They are all good conductors of heat.

B. They all generate heat.

C. They are all electrical conductors.

D. They are all heat insulators.

D. They are all heat insulators.

Explanation:

Those things mentioned above are examples of heat insulators. As a heat insulator, it helps to prevent the heat from leaving the body thereby keeping the body warm and risk free.Feathers in birds and overcoat in humans helps to keep the bodies of the wearer safe and warm during the cold season.

its a 5.5 n

glad that

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y