Earlier quoted context omitted.
It is entirely possible that language development created a self-reinforcing feedback loop for the development of intelligence. I don't think intelligence and consciousness are necessarily correlated though.
Unless you think a shrimp is as conscious as a person, or that a dog is completely lacking in consciousness, you have to accept that consciousness comes in degrees. Unless you believe consciousness is supernatural, you have to accept that it has an organic origin. What that says to me is that humans have evolved brain structures that give us a higher level of consciousness than other animals, and IMO the best candida…
The state of consciousness is correlated with the state of matter. We don't know more than that. We've assumed that physical reality is the ground state and consciousness is the phenomenon, but reality could just as easily be a dream in the mind of the universe. If consciousness can influence reality that would seem to indicate it is either equally fundamental to, or even precedent over material reality. The alternative, that consciousness is a passive observer, is both depressing and unlikely.