Why might some paragraphs not need a concluding sentence?

Identify the controlling idea: “Watching movies at home is more relaxing than going to the cinema.”

A paragraph has this topic sentence: “Exercise reduces stress.” Write one supporting sentence.

Create a topic sentence for this paragraph idea: recycling helps the environment.

Rearrange these to make a logical paragraph: a) This is why reading every day is important. b) Reading improves your vocabulary. c) Reading also makes you a better writer. d) Reading books has many benefits.

Write a concluding sentence for this topic: “Living in a big city has many challenges.”

What are “signal phrases” you can use in a concluding sentence?

Rewrite this weak topic sentence into a stronger one: “Food is important.”

Write a supporting sentence for the topic: “Learning to cook is a useful skill.”

Give examples for too general, too specific and good TSs

A topic sentence often gives the controlling idea. What does “controlling idea” mean?