They make your bones stronger because your bones have to maintain to hold the weight.
D. The hundred-thousands place.
What grade level is this? I will try to help give me a sec
Answer:
They learned to salivate at the sound of a bell.
Explanation:
<em>He learned how to make his dog react this way, knowing that he would get food in return, due to the conditioned stimulus, which makes an individual react in a certain way, because that thing is associated to something else. It's like how we train dogs to "sit" and then we give them a treat to do so.</em>