Question

why is camel leg taller and bear legs short

Answer 1

Camel legs are different from others because their hooves have large surface area that is to make sure that camel doesn't sink inside the sand and is also referred as "Ship of the desert"
bear legs are short to help them run faster.

Answer 2

the camel's front legs by using the lines as guides. Follow the basic path of the guide line as you thicken up the first leg. Draw it lightly at first to get the structure right. When you're happy with what you have, go ahead and darken it. As you darken the leg, give it an extra bump in the middle for the joint and make the top or base wider. Draw the camel's wide feet with two toes at the bottom. Draw a nail at the end of each toe using curved lines. Draw the front leg on the other side the same way. Draw lightly at first to get the structure right as you follow the basic path of the guide line. Don't forget the two toes at the bottom!


then

bears have shorter front legs than back legs, they will somehow be dissuaded from following prey down a slope. This, of course, is not true: bears can run just as fast downhill as they do uphill, and won’t hesitate to. This myth is monumentally stupid because it seems to defy evolutionary logic – would a predator really be at the top of the food chain if it could only chase and attack on level ground or going uphill.

Another is the “hind-legs threat,” which claims that when a bear is on its hind legs, it’s preparing to charge. Like many other species, bears get onto their hind legs simply to get a better view of whatever may be interesting them. If a bear is preparing to charge, it will be on all fours, and have its head down.