Answer:
This is the defense mechanisms known as denial.
Step-by-step explanation:
A defense mechanism is an unconscious process which occurs when an individual cannot handle the stress and anxiety induced by his/her reality and needs to protect him/herself from it.
Denial is a type of defense mechanism in which the individual refuses to accept his/her reality and thus blocks external events which can damage his/her conscience. In this case, he/she can be seen in complete denial and thus acts as if certain things, events or aspects do not exist.