<span>Birds respond to temperature, food availability, and weather conditions.</span>
Solid because it maintains their shape and is rigid
in this case the answer would be letter "D"
The blood protein that binds covalently to multiple fatty acids which are carried to the parts of the body is the erythrocyte or the red the blood cells. These cells bind with fatty acids in order to be easily transported to the heart, the skeletal muscles and the renal cortex.
The answer is D
hope this helps
Xylem tissue that should help you out