Answer:
D
Explanation:
Comets are brightest near the sun.
Answer:
Temperature is a gradation but day/night is all-or-nothing
Explanation:
Temperature change is progressing. I.e from Hot to cold, it moves gradually along a gradient. But Night and Day is a two edged variance. It's either day or night, also know as the All-or-nothing .
Answer:
C
Explanation:
Enzymes act as a catalyst for causing biochemical reactions