Question

which paragraph should have the heading: \mother hummingbirds job?\
a) hummingbirds come in different sizes. the cuban bee hummingbird is the smallest. it weighs about as much as two paper clips. even the giant hummingbird is only the size of a sparrow. these birds may be small, but size has never stopped them - not for a second.
c) the swift wing speed does not just make an interesting sound, though. speedy wings help the hummingbird in many important ways. a hummingbird can zip straight up or dive down. it can fly sideways and backwards. it can even fly upside down! this fancy flying helps this tiny bird get its food.
b) how fast does a hummingbird fly? well, most hummingbirds beat their wings from 55 to 80 times a second! the rapid flapping makes a humming sound. this buzzing noise is what earned the bird its name.
d) the hummingbird mother raises her family by herself. she builds a nest from bits of bark, moss, and other plant materials. she also uses the stretchy silk from spider webs. on the outside, most hummingbird nests are about the size of a quarter. before long, two eggs fill the nest. each egg is the size of a bean.

Explanation:

The text is about hummingbirds, which are part of the biological world. Biology is the study of living organisms. The content describes various aspects of hummingbirds like their size, flight capabilities, wing - beat frequency, and nesting behavior. These are all characteristics studied in the sub - field of Biology.

Answer:

Biology