An enzyme is a catalyst for chemical reactions. Catalyst means that it "speeds up" something. This means that the answer is:
B) Increases the rate of a chemical reaction
Hope this helped!
~Just a girl in love with Shawn Mendes
Answer:
Feathers
Explanation:
For a long time, feathers were regarded as a uniquely avian feature. Bur recent fossil evidence suggests that feathers, too, evolved in theropods before birds.