Answer 1:
An explanation that proposes, forgetting in long-term memory happens because other memories stand in the way of retrieval of what you are trying to remember, for example if the other memories are similar to the one you are trying to remember.
Answer 2:
One theory of forgetting is decay theory, in which the main cause of forgetting is due to passage of time. Another theory of forgetting is retrieval failure, in which forgetting occurs when there is a mismatch between retrieval and encoding. One more theory of forgetting is motivated forgetting, in which forgetting occurs when we don’t want to remember something unpleasant.
Explanation:
Both will get you a 100 %