__ Foam, Substance That Molds Itself to a Shape
Puzzle 2 of Solving a Mystery Easy Pack
Question is: __ Foam, Substance That Molds Itself to a Shape
and the answer is: MEMORY
Word Meaning:
MEMORY — (uncountable) The ability of the brain to record information or impressions with the facility of recalling them later, usually at will.
Definitions from Wiktionary.