Answer:
1) The stranger has come to visit because the house once belonged to his parents, and he grew up there
2) The mother thinks the man could be a thief or possibly a murderer
3) The stranger bursts into tears upon being told that the visit was over
4) The lights in the rooms of the house have dimmed, and begun to flicker and the colors of everything are fading. There are stains on the wall and there is a strange new smell about the house
Step-by-step explanation:
All of these answers can be found directly in the text.