What key traits are specific
land plants

Land plants are multicellular organisms that can be distinguished from other living things by a number of characteristics: They make their own food. Plants are photosynthetic and contain a green pigment called chlorophyll, which enables plants to convert energy from the sun into food. Plants store their food as starch.

Explanation:

You may need to reword it a bit. This should be right.

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.