Answer: supplied air mask
Explanation: because air can go in the mask and the gases and fumes can hurt you.
- Learning about, using, and understanding these pyramids is an ... sides, age on the y-axis, and the percentage of population on the x-axis. ... Rather, it displays percentages and shows what portion of people fall ... The more a graph looks like a pyramid, the faster that population is growing; old generations ...
Err... can someone explain this to me too?
