The type of energy that Max can be said to be using to produce heat as he carries out this experiment is solar energy.
This is the term that is used to refer to the energy that we can get from the sun. The solar energy is what is being used here from the way that the question has described this experiment.
We are told that that the hose was left in the yard. So the light from the sun must have heated up the hose as it was left lying on the ground, Therefore the energy is the solar energy.
Read more on solar energy here: https://brainly.com/question/13174833
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