Question: You are presented with the question "migration changes population size via what?" and the following answer choices: - wind - forces - abrasion - motion - distance - vehicles - Movement - speed Now knowing that migration is a type of movement that changes population size and movement is thought in motion, choose the best answer.
Answer: motion

Question: You are presented with the question "What is used for refracting energy?" and the following answer choices: - wind - a circuit - a prism - Decibels - a window - glass - a doorbell - a wave Now knowing that aprism is used for refracting light and light contains energy, choose the best answer.
Answer: a prism

Question: You are presented with the question "What is secreted by organisms like frogspawn to become a reef?" and the following answer choices: - exocrine glands - food and shelter - exoskeleton - bones - Energy - Chemical energy - plasma - Energy. Now knowing that many corals secrete an exoskeleton that builds up to become a coral reef and good examples are Bubble coral, Elegance coral, Frogspawn and other Euphyllia corals, choose the best answer.
Answer:
exoskeleton