Part 2 of some pfp (girls)

Organum was first developed by religious singers adding another melody directly above the chant and mirroring the chant line. true false

Which of these is a consistent periodic pulse separated into equivalent intervals of time?

Suppose that you are in a room with 3 doors and a crack in the ceiling for light. that is all. the doors each have a sign on them that says what there is behind them. door #1. a pool of corrosive acid. door #2. a crocodile that hasn't eaten in 8 months. door #3. a solar "oven". a giant lens that focuses all the sunlight at the entrance of the door. you must choose a door, which door do you choose?