Which human activities cause desertification in the Sahel?

Choose all correct answers.

drilling for oil

mining

overfarming

grazing large herds

The african continent is home of the worlds largest desert and longest river . t or f

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.

What would have happened to portugal’s trade if they had not found a way to sail around the tip of africa