The correct answer to this open question is the following.
Unfortunately, you forgot to include a question. There is no question here, just a statement.
What is your question? What do you want to know?
If this is a true or false question, then the correct answer is "true."
It is true that the Sahara is the world's biggest hot desert. The Sahara stretches across the northern part of Africa. It is so large that the word stretches is used in this sentence to emphasize the vast size of the desert.
The Sahara Desert is so large that covers many countries in North Africa. We are talking about countries such as Algeria, Sudan, Egypt, Chad, Tunisia, Mali, Lybia, Mauritania, and Morocco.
Can you imagine such an extensive portion of territory? Well, it is larger than Brazil.