Final answer:
A "continental tropical" air mass would be found over land between the Tropic of Cancer and the Tropic of Capricorn. The exact label on a diagram would depend on a clear depiction of climate zones within these latitudinal boundaries.
Step-by-step explanation:
The question relates to identifying and labeling the area on a diagram that represents a "continental tropical" air mass. Based on the information provided, which is focused on climate types and biomes in different regions, the term "continental tropical" air mass is not explicitly mentioned. However, by understanding that tropical climates are generally located between the Tropic of Cancer and the Tropic of Capricorn, we can infer that a "continental tropical" air mass would be situated over land (hence "continental") in this tropical zone.
The diagram or map provided to the student would likely show different climate zones with corresponding labels and using the information regarding latitude and distinguishing features of tropical climate zones, the student would be able to identify the correct area to label as "continental tropical".