chemical contaminations means the contamination of environment by chemical substances like chemical released by industried in water, buring of chemicals in air tjat cause air pollution etc... hope it helsp u
Answer:
determining why a problem behavior occurs
Progressively Overloading his muscles, assuming he is doing weight training, to increase strength over time. he should not stay with the same weight for two months, unless he can perform more reps with better form over time.
<span>Alternating between running and walking is important, especially if you're not a professional runner. You should be walking from time to time to recover a bit from the strain that the running put on you, but not too much or your body starts to cool down and then you have to work all over again or you might lose energy.</span>
