Pick from:
1). warm weather
2). sun's heat
3). rainfall
4). heat energy
5). kinetic energy
6). water vapor
7). colder and wetter
8). Greenhouse gasses

Fact 1: Temperature falls from lower to higher altitudes. Fact 2: If the weather is warm, their temperature rises. Given the two facts above, what falls from lower to higher altitudes?
Answer:
1).