Answer:
a .mental representation
Step-by-step explanation:
At 14 months, Tommy can recall the location of a hidden object after a delay of a day or more. This indicates that Tommy is capable of mental representation. Mental representation is the way the world around us are represented in our memory. Mental representation is essential for information storage and retrieval. If Tommy is incapable of mental representation, he will not be able to recall the location of the hidden object.