What age did Ariana Grande start singing?

she started singing at 15 years old.

15 years old

Explanation:

Grande began acting and singing at a young age. By the time she was 15 years old, she made her Broadway debut in “13,” a play about growing up in New York City

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.

c is the correct answer!