The answer is 28 as an increase in heart rate. Subtract 98 from 70 and get 28.
I would say D the older you get the more chances you have of getting diseases but as a young adult you don't really grow anymore if you do, it's very little. So either B or D
I would instruct them to use the muscles in their legs to push while pulling with their arms
I dont think so, because if the crab was beneath the shark and the fish in the water then it would look like they were flying
D I think sorry if I’m wrong