As the ocean is more covered with the sea, streams, rivers, and other bodies of water, most of the precipitation falls back into them. The percentage of the precipitation that falls back into land is estimated to be 22%. Thus, the answer is letter D.
When the earth goes through seasons, the reason for the drastic difference in temp is because in the winter, our southern half is pointing towards the sun, which means they get more direct sunlight which in turn results in higher temperatures, and during the summer, the northern half is pointed towards the sun, so they receive higher temperatures because they have more direct sunlight.
Eratosthenes was the first to accurately calculate the circumference of the earth