I believe the answer is: compression
Compression refers to a type of force that pressed a person or an object inward, causing it to become more compacted. If this type of force happen to our spines on a constant basis, over time our back bone would start to succumb to the force and bent over forward to accommodate the weight.
B. She is having trouble eating
When you run or do other exercises your working your cardiorespiratory system. when you work on something it gets stronger and more able to do excercises fpr a longer period of time
<span>the drug blocks a chemical reaction
</span>the drug stimulates a chemical reaction