Answer: In order to clearly state what the paper will be about, the student should add the following sentence to the end of the paragraph:
If you follow these steps, learning to ride a bike can be easy and enjoyable.
Step-by-step explanation:
Normally, ending of a paragraph should be a one-line summary of the particular paragraph. It will be purely based on the content of the paragraph and that will be preferably an optimistic ending line.
When we consider the given options, the one which fulfils the above criteria is option c. Even though other options are related to the context, they do not have a positive conclusive nature to include as an ending sentence.
So, in that aspect, ' If you follow these steps, learning to ride a bike can be easy and enjoyable.' well suits as an ending sentence for this particular paragraph.