Sentences of a paragraph are given below. While the first and the last sentences (S1 and S6) are in the correct order, the sentences in between are jumbled up. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.
S1. One can find ants anywhere on earth.
A. They also use chemicals called pheromones to leave scent.
B. They can communicate effectively with each other.
C. Thus, they are called the earth’s most successful species.
D. There are about 2,000 species of ants.
S6. These scent trails help other ants to follow.