Steve is studying with his friend mike for their biology test. mike asks steve about a particular concept and steve replies, "i know i was in class that day but i don't even have that in my notes. are you sure the professor mentioned it? " steve is demonstrating a(n) failure.

encoding

Explanation:

According to psychology, there are three processes involved in human memory:

In this example, Steve says he knows he was in class when the teacher mentioned the biology concept but he doesn't have that in his notes so he's not even sure the professor mentioned the concept. Thus, we can see that Steve has no recollection of the concept and we can conclude that it is not in his memory, thus, this information was not even encoded. Therefore, he is demonstrating an encoding failure.

credit card number 4 is the right answer