स्वास्थ्य पेशेवरों द्वारा निम्नलिखित में से किस उद्देश्य के लिए 'पांच खाद्य समूह प्रणाली' का प्रभावी ढंग से उपयोग किया जा सकता है?

Frequently skipping breakfast during adolescence primarily negatively impacts which of the following?

Which dietary habit is considered most effective for school children to maintain energy levels and mental focus throughout the day?