A because you should tell what the paragraph is about, provide evidence to support your topic, and explain how the evidence supports your topic.
I saw the effect it had on people.
There was a limit of how much candy I could have.
There is a reason for my actions
The technology in the future will be more advanced than it is today.
The solution to my problem is in the text.
There was a demand for water in my town.
A new housing developer came to look at a house.
The profit he recieved was overwelming.
My supplies was running low.
The new version of my phone came out today.
I had to estimate the answer to my question.
I had to update my profile picture.
He had to calculate the answer.
The characteristic that Ralph shows is his bravery as he is defending Piggy against such great numbers ( the entire tribe ).