The Present Simple is used :

      ►To talk about regular activities, routine, habits:                                                
           -  John plays tennis once a week.
           -  We start work at 9 a.m. every day.
           -  Mary eats fish on Fridays.

      ►To talk about tastes:
            -  Peter likes Chinese food.
            -  Julie doesn't like fish.
            -  Their children love chocolate.

      ► To talk about facts:
           -  The sun rises in the east.
           -  In Europe, the weather is cold in winter.
           -  Authors write books.