1. The separation of a substance into simpler substances or basic elements. 2. The process of decaying or rotting. Decomposition of dead organic matter is brought about by the activity of certain bacteria and fungi feeding on it.
As you grow older, you would need to remain physically active to keep a good level of physical fitness.
Answer: T
Horizontal lines, like the horizon. That's how I remember it, anyways. Or on a globe, latitude lines. My teacher always taught us "FAT-itude lines."
Chirping, if that's what you mean.
Almost possitive it is oxygen cause there was no ozone