Final answer:
Fleshy fruit include not only common fruits like apples, oranges, and cherries but also cucumbers and tomatoes, which are botanically fruits despite being commonly labeled as vegetables. Thus, the correct answer is D. All the above.
Step-by-step explanation:
A fleshy fruit is a mature ovary that thickens as the seeds develop and is characterized by being soft and often edible. Examples of fleshy fruits include a wide variety of plant produce. Fleshy fruit can include berries, peaches, apples, grapes, and even what we typically consider vegetables, like, because they contain seeds and are derived from the thick ovary tissue.
In light of this, the correct answer to the student's question about which of the following is a fleshy fruit, the answer is D. All the above: cucumbers, tomatoes (commonly referred to as vegetables but botanically are fruits), cherries, apples, and oranges.