No because it was not his grandmother's fault he believes
Benevolent and Kindhearted are similar in meaning, kindhearted is typically defined as having a kind nature whereas benevolent is typically defined as being kindly.
Area in Math is what is inside of an outline/shape. For example, if you are given an outline of a rectangle, you can calculate the area by multiplying one short side with one long side. The total number gives you the amount of space inside the rectangle.
I hope this helped!