Question

Which of these methods would be most effective in allowing someone to precisely gauge the intensity level of his exercise

Answer 1

Answer choices are:

A) Complete the talk test

B) Ask a coach

C) Take his pulse

D) Monitor his water intake

____________________________________________________________

Correct answer choice is:

C: Take his pulse.

____________________________________________________________

Explanation:

Heart rate is an exceptional way to ascertain exercise intensity as it’s not subjective. Your heart sends blood throughout your body. The vigorously you exercise, the higher the need for oxygenated blood, and consequently the greater your heart rate will be. Because your heart reacts to exercise in a very anticipated way, you can use your heart rate to control exercise intensity. You can regulate your heart rate by using a heart rate adviser, observing your pulse at your wrist or neck, or utilizing the sensors fabricated into cardio exercise machine.

Answer 2

You didn't provide us with any possible answers but if this is the list that you meant:
Complete the talk test
Ask a coach 
Take his pulse
Monitor his water intake

Then the correct answer would be C - take his pulse. 

Doing this, he would able to witness and explore what kind of stress did he put his body under.