The correct option is number 2 "when". The reason is that the author wants to make reference to the year 1960, and the pronoun "when" refers to points in time. The pronoun "there" is used to refer to Alexandria, so option 1 is not correct, rather it is redundant. Option 3 simply does not apply, since the relative pronoun "which" is used to refer to objects.
Question 1:
When I was younger, about six years old, I would play hide-and-seek in the forest near my house with my three siblings. It was becoming dark, and I was hidden under a fallen log. I was always the best at hiding and they always found me last, but on that night, I was wishing that wasn't the case. At some point, the light was almost completely gone, with only the light from the moon helping me see. I started to panic, but didn't want to give myself away and lose, so I stayed there, waiting. I started to hear russling in the bushes around me, and gave up on hiding. I crawled out and started climbing a tree as a new hiding spot that was away from whatever had been in the bushes. I looked down and saw wild animals slowly moving back and forth along the ground at the base of the tree and stifled a scream. I stayed there, un-moving, for half an hour before I heard something walking towards me. I was shaking, trying to stay silent while the creature stomped around my tree. I could picture a cougar or a mountain lion ready to pounce, stalking me. Suddenly I saw something stumble into the small clearing near me and screamed, nearly falling to the ground. My older brother grabbed me and laughed, "I guess I found you then." he said with a laugh. I grinned, trying to stop myself from shaking. I was okay, it was just my brother. From then on, I refused to play when the sun started to set.
Question 2:
I used imagery to show what I saw, and not what was truly there. I wrote as though it was a description of what was there, instead of just stating obvious things. For example, instead of saying the baby trees and shrubs swaying in the wind, I called them wild animals, becasue that is what I saw them as in the dark.