Animal studies indicate that: a) mammals may be relatively better at solving problems than birds b) birds have far superior reasoning skills when compared to other animals c) animals do not learn from previous experience d) animals are incapable of solving problems in their environment.

a) mammals may be relatively better at solving problems than birds

Explanation:

The most renowned case of critical thinking creatures are chimpanzees. Science has demonstrated  that apes are competent to take care of issues that require unique thinking. Nowadays, our feathery friends  are being  watched for causal thinking and it is indicated that certain birds are capable of  critical thinking errands.