Fact 1: Asandbar is formed by water moving sediment downstream. Fact 2: Bare sandbars are the ideal spots for new stands of cottonwood. Given the two facts above, answer the question "What is required for the ideal habitat for new stands of cottonwood?" with the following options: - sunlight - nutrients - warmth - Sediment - Black tar - Hot magma - trees - Chainsaws
Sediment

Fact 1: Mollusks live in most terrestrial, freshwater, and marine habitats. Fact 2: Mollusks in the diorama include snails and clams. Given the two facts above, answer the question "What kind of animal lives in most terrestrial, freshwater and marine habitats?" with the following options: - animals - swimming - snails - tortoises - barnacles - swea - protected - a fish
snails

Q: Fact 1: Animals may compete for territory, water, food, or mates. Fact 2: Pigs are very intelligent animals. Given the two facts above, answer the question "what may compete for territory, water, food, or mates?" with the following options: - humans - pigs - Birds - density - gravity - clouds - bears - koalas
A: pigs

Question: Fact 1: Afirecracker converts chemical energy into sound. Fact 2: Sound waves vibrate. Given the two facts above, answer the question "a firecracker converts chemical energy into what?" with the following options: - kinetic energy - Loud noises - vibrating waves - An object is seen - electromagnetic energy - deoxyribonucleic acid - hydrogen and oxygen - harmful substances
Answer: vibrating waves

*Question*
Fact 1: Testosterone stimulates the reproductive organs to develop into male organs. Fact 2: Male mammals have a tube-like organ called the 'penis'. Given the two facts above, answer the question "What causes the penis to develop?" with the following options: - Creatine - Energy - Estrogen - Testicles - matter vibrating - Testosterone - movement - It expands
**Answer**
Testosterone

(Question)
Fact 1: Amphibians have a relatively complex circulatory system with a three-chambered heart. Fact 2: Frogs, toads and salamanders are amphibians. Given the two facts above, answer the question "Which animal has a circulatory system with a three-chambered heart?" with the following options: - animals - Salamander - fur seals - mammals - alpacas - a fish - warm-blooded - barnacles
(Answer)
Salamander