what is then end goal of a brains training exercise? why might time only tell if the exercises work? springboard

Here hope this helps.

Explanation:

Mental abilities that tend to decrease with age include processing speed, reaction time, decision making, short-term memory, and planning skills. Brain training may be helpful for sharpening these abilities, and it may help reduce the risks of some age-related memory problems.

are there multiple choice options?

remember, the goal of an adjective clause is to add more information to a noun or a pronoun. as you can see from the examples above, you can add information by including a longer adjective clause or tighten up a sentence by turning the adjective clause into an adjective phrase.