Which type of bias involves becoming fixated on a single trait of a problem?
anchoring bias
confirmation bias
representative bias
availability bias

anchoring bias

Explanation:

The anchoring bias makes the previous exposure to information lead us to consider it strongly in decision making or estimation, regardless of its relevance to what is decided or estimated, ie it is a bias that involves fix on a single trace of a problem.

One of the main reasons for this kind of bias to happen is that our mind is unable to efficiently evaluate absolute magnitudes, always needing a reference point to base its estimates and judgments on.

nah the answer is the use of taxation to encourage or discourage certain behavior