In the context of criminal law, what is imputability and how is it related to age?

Imputability is the capacity of the person who committed the crime to understand the significance of their actions and to be held responsible for them.
Age is a factor that can influence imputability, as it is necessary for the person to have the psychological maturity to understand the consequences of their actions.
International treaties signed and ratified by Mexico establish that the age of criminal responsibility should be set at 18 years old.