what are the answers to these two biology?

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1.A crown fish swims along the poisonous tentacles of stinging sting ray. the crown fish is not affected by this.
this is a result of
a.NATURAL SELECTION
b.SELECTIVE BREEDING
c.PARASITISM
d.SUCCESSION

2.2. there was a picture of a tree's evolution, and a butterfly's evolution. i think it asked what was there difference
a.FERTILIZATION
b.INCOMPLETE METAMORPHOSIS
c.COMPLETE METAMORPHOSIS
D.ALTERNATION OF GENERATIONS
what's succession, and alternation of generations
 
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