How can attentiveness be manifested?

Attentiveness is just what it sounds like. The act of being attentive or paying attention. Giving an object or person attention.

children that eat healthy in the morning are more attentive in school than children that children that don’t

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Every single disease can manifest in a variety of ways. Please pick one at a time.

man·i·fest (mān'ə-fěst') Pronunciation Key adj. Clearly apparent to the sight or understanding; obvious. See Synonyms at apparent. tr.v. man·i·fest·ed, man·i·fest·ing, man·i·fests To...