I believe the answer is B. they respond to stimulli
<span>The gland which signals other glands to secrete hormones is the pituitary gland.</span>
Acceleration is a little more complicated. It is defined as the rate of change of the object's velocity over its change in time. ... Or, if the acceleration is negative, it's called deceleration and describes something slowing down. For something to speed up or slow down, it has to have a certain change in velocity
