Answer:
(x+y)^4
Explanation:
im pretty sure because you just multiply by 4 instead of adding
O air-filled cavities that secrete mucus to keep the nose moist and remove bacteria.
Your experiences your experiences
B. Old Stone Age.........................
The body shivers, shivering is something your body does in oder to keep warm. It is moving the muscles around, and trying to heat you up.
