I believe it is A. because hypothesis is an eduated guess, usually with limited evidence.<span />
Kuniper belt is equal distance to 4.039•10^9.
alpha centauri is equal distance to 2.734•10^13.
1. courtship rituals 2. attract a mate 3. internal fertalisation occurs inside the feamales body whereas external fertalisation occurs outside the feamales body 4. <span>Gametes may get washed away 5. the devoloping zygote is protected</span>
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