Answer:
Jem's pants were folded, hung on the fence, and stitched.
Jem and Scout find carved soap figures of themselves in the knot-hole.
Someone put a blanket over Scout's shoulders during the fire, while she was standing in front of the Radley's house.
Step-by-step explanation:
These are the signs that show that Boo Radley is alive in chapters 7 and 8. The first indication of this occurs when we learn that Jem's pants (which he lost when sneaking into the Radley's house) were folded, hung on the fence, and stitched when he retrieved them. We also learn that Jem and Scout found carved soap figures of themselves in the knot-hole on the tree. Finally, while watching the fire, Scout noticed that someone put a blanket over her shoulders, and she realizes this was also an action by Boo Radley.