Answer:
No topic mentioned, it depends on the topic you choose.
Step-by-step explanation:
Start the answer off with
I want to learn ____ because ____
Going from there is easier. All you have to do is fluff the answer up with filler sentences and descriptive words. Describe why you would like to learn about your topic.
Here are some examples to start off with;
"I would like to learn to draw, because my aunt does it a lot."
or;
"I want to learn to program so I can start my own business."
Keep adding reasons why you'd like to do this, until you meet your requirement, and add filler and fluff to meet the long sentence requirement.
For example,
"I want to learn to program so I can start my own business. Programming makes it easier to make websites and advertising. I also generally find it pretty interesting and captivating."
We could've very easily added the last sentence into one of the previous. Just like this;
"On top of being cool, programming makes it easier to make websites and advertising online."
But despite being concise and clear, you may not meet your requirement or get full marks because of the lack of descriptive words.
Just by using adjectives and making longer sentences, you can easily complete questions like this as well as summaries, reflections, and other quiz questions that require 3 or more sentences with ease.
Look at that, you're already halfway done with the answer!