Q: Which of the following are the factors that cause variation in the amount of insolation on the Earth? 1. Rotation of the earth on its axis 2. Length of the day 3. Distribution of land and water on the earth Select the answer using the code given below:
(a)1 only
(b)1 and 2 only
(c)2 and 3 only
(d)1, 2 and 3
Answer pending verification