Which of these is an example of a hypothesis? a. observe a plant kept in the dark. b. wonder why plants grow well in sunlight. c. leaves may change color due to tempature. d. add different quantities of water to three potted plants.

genetic variation will increase because of a new habitat and food source.

explanation:

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.