Answer:
The correct answer is: A. Helps them to prepare for dangerous weather and C. Helps them to harvest their crops at the right time.
Step-by-step explanation:
Weather forecasts are scientific predictions that show future meteorological conditions. They are based on mathematical models and they have multiple purposes for human beings.
One of the most common purposes of weather forecast is to prepare people for upcoming dangerous weather, and also, it helps them in their economical activities such as harvesting.
In conclusion, the correct answer is A. And C.