The difference between growth and development depends on the context, the jargon in which the terms are being used. ... In biological systems, growth indicates a quantifiable change in size, whereas development indicates a transformation of structure.
https://www.quora.com/What-is-the-difference-between-growth-and-development
Evolution over time has allowed them to adjust to their surroundings. Birds can also survive on eating less/smaller things whereas reptiles usually have to eat more to survive. Also, birds eat a lot of plants while reptiles eat a lot of meat.
Answer: because oil is less dense than water and therefore it floats to the surface.
Explanation:
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