Final answer:
The correct term for the fatty fold under a doe's lower jaw is a Dewlap, which corresponds with 'Dew' from the given options.
Step-by-step explanation:
The large fatty fold located under a doe's (female) lower jaw is called a Dewlap. The correct answer to the question is Option 3) Dew. A Dewlap can assist does in thermoregulation during hot weather, as well as serve as a reserve of nutrients during colder seasons when food isn't as plentiful. The labia majora are folds of hair-covered skin that begin just posterior to the mons pubis. They serve to protect the urethra and the entrance to the reproductive tract.