If erosion can cause unstable terrain, then what can erosion cause? Answer choices: - hurricanes - h2o - Pollution - slow and inefficient - unstable terrain - Physical weathering - flooding - hydrogen
unstable terrain

If playing is one way that lions learn how to behave, then what learns to behave through playing? Answer choices: - otters - bacteria - viruses - rocks - lions - animals - humans - Birds
lions

If mammal hearts have two more sections than fish hearts, then how many sections does a fish heart have? Answer choices: - ovum - fat - four - p53 - two - cut - bone - stem
two

If plant requires animals for reproduction, then what do plants require for reproduction? Answer choices: - energy - nutrients - bloom time - animals - sunlight - Energy. - food - hormones
animals