Ventilator should be kept in our room give reasons of science ​

Ventilators are provided in the rooms at the top of the roofs because if the air inside the room gets hot, the hot air rises up and flows through these ventilators and thus cool air remains at bottom. Thus ventilators maintain conventional currents to keep the air fresh in the room.

Explanation:

let's say scientists are terible they lie about everything

Explanation:

i would say b

explanation:

but i think i would need more information than that