Smooth muscle and the heart is involuntary
What are the following? all you have is the beginning of the question. I will say that a strict diet is not actually needed, and that you should start easy and slowly work your way up, so if it says that heavier weights will make you stronger, that is incorrect, they will only hurt you.
The correct answer is there is no absolute measure of flexibility.
There is no accepted standard of flexibility. There are US and international health related tests and exams that have items in them that are used to measure flexibility but there isn't a standard that they are set against.
Because If he had a unhealthy environment he ourselves would be less healthy and nobody likes being unhealthy.