Write an interesting story which ends with the words, it pays to be kind to strangers

I will never forget the unknown angel who saw my son, Devansh, lying on the road injured and saved his life. Devansh was in class XI and was headed to school when he was hit by a speeding vehicle. The woman stopped to help, found our phone number in his school diary and informed us right away. She saw a passing school van and stopped it. After asking the children to get down, she sent Devansh to the nearby MBS Hospital. She must have taken care of the task of dropping the children to their school. A couple of hours later, she called my husband to make sure Devansh was all right. My boy was seriously injured, but the helmet protected him. It was the kind lady who really saved his life lesson learned: it pays to be kind to strangers 

Explanation:

a. inform

explanation:

"how to" tells us that it will explain how to, which means to inform

there is no sentence to look at.