IF CORRECT I WILL MARK BRAINLIEST Select the correct answer.
Philip is snorkeling along a coral reef. He’s wearing an altimeter, which tracks his elevation. Philip snaps a picture of the reef at an elevation of --10 1/2 feet. Then he spots a nurse shark and swims to it for a closer look. By the time he reaches the shark, his elevation changes by

--3 1/2 feet. What is Philip’s elevation when he reaches the shark?

O-7 feet
O-8 feet
O-13 feet
O-14 feet