Nectar is a sweet liquid that some flowering plants produce. A hummingbird drinks nectar from a flower. When a hummingbird drinks nectar, pollen from the flower sticks to the hummingbird's beak. The picture shows a hummingbird drinking nectar from a flower. Which statement explains the role of a hummingbird in the life cycle of a flowering plant?
A: A hummingbird helps the plant reproduce.

An ice cube placed in sunlight melts quickly. Which BEST explains this event?
A: The Sun makes heat.

Which list gives the correct order of substances from the lowest melting point to the highest?
A: oxygen, water, iron

Which is the correct order of the metamorphosis of a butterfly?
A:
egg, larva, pupa, adult