An acute strain is caused by trauma or an injury such as a blow to the body; it can also be caused by improperly lifting heavy objects or over-stressing the muscles.
Cancer is caused by accumulated damage to genes. The substance that causes cancer is called carcinogens.
Answer:
Internal can be you don't want bad things happening to your body, you don't want drugs affecting your health,etc.External could be you don't want it to affect your family or people around you.For example, like a cigarette if you are smoking in public you can be affecting others passing by or hanging out with you(external)but if it's just you by yourself smoking it is damaging your lungs(internal)
Well I do say from my studies and experience, that a warm up should be less intense than the exercise, because you don't wan't to workout to hard before getting to the main exercise, that's like having a huge appetizer then then main course meal. So my final answer would be C. Hope this helps
Answer:
The reason her grandfather might understand her father better than hers could be because it's his son. Her grandfather raised her father. Which could effect their communication.
