When behaviors lead to negative consequences we have a tendency to attribute our own behavior to external, situational causes, whereas we attribute the behavior of others to internal, personal causes. this is referred to as:

actor-observer discrepancy

Explanation:

Actor-observer discrepancy: In social psychology, the term actor-observer discrepancy or bias is defined as an individual's propensity to attribute his or her actions to some external causes whereas he or she attributes the other person's behavior or actions to some internal causes.

It is considered as a form of attributional bias that leads to develop the way an individual interacts or perceive the other person. It generally covers others and one's behavioral attributions.

In the question above, the given statement is referred to as actor-observer discrepancy.

fir trees are found in areas with cooler climates. fir trees have needles for leaves and remain green year-round.