You have seen a tennis ball, a cricket ball, an orange and a pumpkin. Which one amongst these resembles the shape of the earth? Why have you chosen this particular item to describe the shape of the earth?
An orange resembles the shape of the Earth. I have chosen this item because the context states that the earth's surface is not uniform and has variations in its physical features such as mountains, hills, valleys, plains, plateaus, oceans, lakes, deserts and wilderness.
Unlike a tennis ball or cricket ball which are perfectly smooth and spherical, an orange has slight irregularities on its surface. This makes it a closer representation of Earth, which is not a perfect sphere but has surface variations. A pumpkin is too irregular in overall shape to represent Earth's roughly spherical form.
Explanation
The textbook context mentions that 'The earth's surface is not uniform. It has variations in its physical features. There are mountains, hills, valleys, plains, plateaus, oceans, lakes, deserts and wilderness.' This key information helps students understand that Earth is not a perfect sphere like a smooth ball, but has surface irregularities. An orange, being spherical yet having a textured, slightly uneven surface, best represents this characteristic among the given options.