Fact 1: Migration is a type of movement that changes population size. Fact 2: Population viability Population sizes are under constant fluctuation. Given the two facts above, answer the question "What can happen to a population when animals begin to migrate?" with the following options: - It expands - harm them - it can change species - Move to another area - it can eat more - it can go extinct - it can fluctuate - Plant growth is reduced
it can fluctuate

Fact 1: Many corals secrete an exoskeleton that builds up to become a coral reef. Fact 2: To fisherfolk, coral reefs are homes to fish that are waiting to be caught. Given the two facts above, answer the question "What do exoskeletons secreted by corals do?" with the following options: - Give homes to humans - Give homes to penguins - competing for resources - Give homes to fish - reproduce - Give homes to birds - preventing heat transfer - protect them
Give homes to fish

Q: Fact 1: Ants communicate with chemicals called pheromones. Fact 2: Pheromones are stinky chemicals excreted from glands throughout the ants body. Given the two facts above, answer the question "Ants communicate via" with the following options: - mechanical waves - telepathy - radio waves - radiative transfer - electrically - excreted chemicals - sensory neurons - during the day
A: excreted chemicals

Question: Fact 1: Adelta is formed by deposition of sediment at the mouth of a river by water fanning out. Fact 2: After sediments are deposited, they are gradually buried by more sediments. Given the two facts above, answer the question "What can lead to the gradual burial of more sediments?" with the following options: - erosion - loose soil - an ocean - a wave - a delta - wind - a lake - flooding
Answer: a delta

*Question*
Fact 1: Asandbar is formed by water moving sediment downstream. Fact 2: Native species, such as cranes, use open water and barren sandbars for roosting at night. Given the two facts above, answer the question "What happens on the formation where water moves sediment downstream?" with the following options: - mechanical - watershred - erosion - cranes roost - near the shoreline - streams. - it can be seen - swamp vegetation
**Answer**
cranes roost

Q: Fact 1: Behaviors can be learned through play. Fact 2: Kids play hockey in the driveways. Given the two facts above, answer the question "what can behaviors be learned through?" with the following options: - recovery - hockey - walking - density - dogs - gravity - exercise - volume
A: hockey