Sample writing:

Street food has become more and more popular in cities and towns, and it has several advantages. Firstly, it is very convenient: you can find it everywhere, and you can have it anytime of the day, from early morning till late at night. Secondly, its prices are reasonable, and so most people, especially students, can afford it. Thirdly, it is usually delicious, and it easily suits everyone's taste. In short, there are many good things about street food, so many people have it almost everyday.