Step 1: Recall major difference.
Both gymnosperms and angiosperms produce seeds, but the key difference lies in whether the seeds are enclosed.
Step 2: Explain distinction.
Gymnosperms → “naked seeds,” not enclosed within fruit.
Angiosperms → seeds enclosed inside fruit (developed from ovary wall).
Step 3: Conclusion.
Feature that distinguishes them: presence of seed cover (fruit enclosure).