Mark is looking to buy his first home. his friends suggest that he check the style of the house and the number of rooms. he is, therefore, focusing extensively on the look of the house to evaluate its value, rather than its condition or location. this implies that mark was engaging himself in the bias.

The answer is anchoring bias. This is a reasoning bias that labels the shared human inclination to depend on too heavily on the first piece of information existing (the "anchor") when making conclusions. Throughout the decision making, anchoring happens when individuals use an early piece of information to make following judgments.