15 points plz tell me
4. The sun is the main source of the heat and energy on the earth. If the sun does not shine or remains hidden by the clouds for many months, what will be its effect on the earth? Think and answer. (HOTS)
5. Human endeavors have made our life easier and comfortable than ever before. But, this development has added impurities and caused deadly imbalance in nature. Think about the ways in which we can help in maintaining natural balance. (VALUE ADDED QUESTION)