James's nice asked him about her grandfather. She was interested in learning about what?\nOptions:\n- family tree\n- family reunion\n- babysitting\n- brother's house\n- heirlooms
Let's think step by step below.
family tree
Grandfathers are a part of family tree.

A family tree has a detail about all family relations like grandfather etc.

One can learn about family through family tree.

.

The answer is family tree