The correct answers are:
1 - c. steppe region; the steppe region is a region that falls into the semi-arid category, so it is not a region known for high precipitation, instead it usually just gets sporadic summer rain.
2 - d. cheetah; from the animals on the list the cheetah is the most endangered so it is not a common site that this big cat known for its amazing speed comes in front of your eyes.
3 - c. the Sahara extends into southern Africa; the Sahara desert stretches between the Atlantic Ocean and the Red Sea (west to east), and from from the the northern lines of Central, Western and Eastern Africa to the Mediterranean coast (south to north), so we can simply say that it occupies most of northern Africa and that it has no connection whatsoever with the southern part of Africa.