The answer is A. Excretion I hope this helps
Answer:
The topmost zone near the shore of a lake or pond is the littoral zone. The near-surface open water surrounded by the littoral zone is the limnetic zone. The limnetic zone is well-lighted (like the littoral zone) and is dominated by plankton, both phytoplankton and zooplankton.
Explanation:
Birds are Oviparous animals, they have small uterus (portion where child grow in viviparous animals), just due to that, they lay seeds than breed
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