Answer:
When people say "act your age," they are referring to chronological age.
Step-by-step explanation:
Chronological date can be defined as the date to count how many years a person has lived. The chronological date is mostly used in psychological tests. It is mostly used to compare the actions of a person like intelligence, activeness, etc to his/her age. So, when a person says to act your age, he/she means to take actions according to the experiences you have gained from the years you have lived.