What kind of musical instrument is a harmonium​

Harmonium, also called Reed Organ, free-reed keyboard instrument that produces sound when wind sent by foot-operated bellows through a pressure-equalizing air reservoir causes metal reeds screwed over slots in metal frames to vibrate through the frames with close tolerance.

Explanation:

answer; a database is an organized collection of data in digital format that users to keep track of information;

this is true. vitamins and minerals wounds heal and boost your immune system so you don’t get as sick.