Muscular strength
in case you didn't know the definition of muscular strength, you could use process of elimination. it's not muscular endurance because endurance is testing how long you can do something over a period of time, and the question is asking about all at once. it's not flexibility or body composition because neither are testing how much force your body can exert. that leaves muscular strength.
he would be suffering from a life threatening condition. if lasts to long he could go into a coma. its called heat stroke. symptoms can feel like a heart attack.
The answer is either he is using his large muscles or his body heats up but I am not sure which one sorry hope I helped a little
Answer:
when the temperature rise the content of the containers will heat even more causing the internal pressure to continue to rise.