Q: Fact 1: Courtship is behavior that is intended to attract a mate. Fact 2: Moose courtship begins in autumn. Given the two facts above, when do moose begin behavior intended to attract a mate? | OPTIONS:
- Winter
- howling
- The past
- sweating
- Summer
- autumn
- ligt
- movement
A: autumn

Q: Fact 1: Roundworms make up the phylum Nematoda. Fact 2: Also, nematoda and rotifera are important groups contributing to soils. Given the two facts above, what contributes to soils? | OPTIONS:
- roundworms
- humans
- rainfall
- cacti
- bacteria
- weathering
- viruses
- Most plants
A: roundworms

Q: Fact 1: Natural disasters can cause animals to leave an environment. Fact 2: Animal migration is mystery of nature. Given the two facts above, natural disasters can cause ? | OPTIONS:
- deforestation
- kill them
- Pollution
- disease
- deadly
- erosion
- migration
- flooding
A: migration

Q: Fact 1: Most canyons are formed by flowing rivers through erosion over long periods of time. Fact 2: Deep canyons and valleys are carved out. Given the two facts above, what are formed by flowing rivers through erosion over long periods of time? | OPTIONS:
- deserts
- a hydraulic system
- deep valleys
- pyramids
- Calcium carbonate
- patch reefs
- buildings
- Sediment
A: deep valleys