Which statement best compares a dolphin and a mushroom? Both need blood and food. Both need food and air. Both need lungs and air. Both need lungs and blood.

1 digestive system

2 stomach

3 bladder

4 carbon deoxide

5 tiger

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.