Your attention has been said to involve a that filters out everything except the information we are attending to.

bottleneck

Explanation:

The human brain can only process a specified amount of information at a given time. If more information is sent to the brain then it leads to a bottleneck.

As a result, only the relevant information that is required in the situation is processed. This means that irrelevant information is filtered out.

Hence, the statement here is referring to the bottleneck.

explanation:

i believe the primary and secondary sectors

answer; i believe that the correct answer is ( rivers);