The answer to question (1) is true. Retention is part of the process of memorization, where the ability to keep information and events are a definition of the term.
The answer to question (2) is also true. Phonemic refers to phonemes, which is defined as a sound unit.
The answer to question (3) is false – semantic encoding refers to how a person would memorize a word based on its meaning, not from its physical structure.
The answer to question (4) is also false, since reading a book is a form of divided attention.