2.
Explain why holes are made in hanging banners and
hoardings.

holes are made in hanging banners and hoardings to allow air to pass them as result of which there will be less pressure of air on the banners and hoardings .Unless it is done ,these may be uprooted or distorted due to the pressure of the the air

an enlarged virtual image

sleep paralysis is a parasomnia, events associated with sleep.

sleep paralysis happens when you are in the middle of waking up or falling asleep. it is the feeling of being conscious but unable to move. it definitely involves hallucinations.

i had a friend that had sleep paralysis and he told me a story one time where he was laying in bed and he couldn't move his body no matter how hard he tried and there was someone standing in the corner of his room coming towards him. he couldn't move and you can't "wake up" because you are already conscious. sometimes sleep paralysis can be triggered by frequent waking up during the night based off of multiple trips to the bathroom, or if you had ever been abused, sleep paralysis can start happening from things like that.