The is between the mesosphere and the exosphere. troposphere stratosphere thermosphere exosphere

I think that Thermosphere would be the correct answer.

My first thought had been the stratosphere but that is located right above the troposphere. While the troposphere is located beneath the mesosphere the only option left that could be correct is the thermosphere.

100 pounds is 100 pounds no matter the object or item being weighed

Fitness is the ability to perform only very light levels of physical activity.