(1) is pretty horrible. (2) is fine as far as the agreement is concerned. To be fussy, it has a slight imperfection in that it can be read as meaning that chimpanzees are generally like dolphins, not just in terms of their intelligence.
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(1) is pretty horrible. (2) is fine as far as the agreement is concerned. To be fussy, it has a slight imperfection in that it can be read as meaning that chimpanzees are generally like dolphins, not just in terms of their intelligence.
fire1Chimpanzees are intelligent animals like dolphins.
I'd write it like this:
Chimpanzees and dolphins are intelligent animals.