Height and Weight examples in module 3 are a bit awkward

Didn't particularly enjoy explaining this code, defining bodily adjectives by means of weight and height made me feel like I was walking on eggshels. I'll come up with a different example unless anyone else beats me to it.

Start by locating the Module 3 course material and reviewing the height and weight example described in the issue. Replace that example with a more comfortable alternative while preserving the lesson's intended explanation, then check that the surrounding material remains coherent.

Escrita pelo modelo de indexação a partir do texto da issue.