Dumbocalypse

The brainpower-boosting wave experiments of Professor Brain had disastrous consequences, rendering everyone foolish and lacking direction. To address this issue, he promptly developed an app that allows individuals to seek answers from YOU. It's worth noting that apps for practically any purpose abound nowadays, so don't be taken aback.
The well-known scholar, Professor Brain, attempted to produce brain-enhancing waves through experimentation. However, his endeavors ended disastrously (as frequently happens with him), rendering everyone intellectually challenged and incapable of fulfilling their daily duties. In response, he rapidly designed a mobile application that permits individuals to present queries and receive responses from YOU; it is indeed extraordinary how there exists an app for every conceivable need in modern times.

Your task is to respond to individuals in the most effective way possible, maintaining balance on Earth. However, take care not to overpopulate the planet or cause human extinction. Be mindful of their emotional state; neither make them too sad nor too happy. It's that straightforward! Now go out and aid those struggling souls while also enjoying yourself!