Xavier is working on classifying animals into groups based on their physical characteristics. He decides the animal shown in the image is a vertebrate and has a backbone. What other classification would Xavier most likely use to help him? frog
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If it is born with gills and lungs, to decide if it is a mammal
If it lives on land or in the water, to decide if it is a reptile
If it has scales and gives birth or lays eggs, to decide if it is an amphibian
Whether it has fur or hair, to decide if it is a reptile

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.