Final answer:
A plant in the forest with large, broad leaves is most likely an angiosperm, as gymnosperms often have needle-like leaves and angiosperms include broadleaved trees and flowering plants.
Step-by-step explanation:
If you encounter a plant with large, broad leaves in the forest, it is likely to be an angiosperm. Gymnosperms, such as conifers, typically have needle-like leaves and their seeds are not enclosed by fruit. In contrast, angiosperms include many broadleaved trees and are known for having large leaves, suitable for maximizing photosynthesis. Additionally, angiosperms encompass flowering plants, some with large leaves that are used to float on water surfaces, such as the water lily. Due to the description provided, the plant with large, broad leaves is not a gymnosperm, fern, or moss, but best fits the characteristics of an angiosperm.