In the following pairs, circle the number of the best topic sentence.
1) There are many environmental problems around the world.
2) It's important to save the rainforests in South America.
Please explain the reason why do you choose it, and why the sentence you didn't choose is weak.
1) There are many environmental problems around the world.
2) It's important to save the rainforests in South America.
Please explain the reason why do you choose it, and why the sentence you didn't choose is weak.