What does placing mean?

Make the following sentences:

1. The potted flowers are placed on the shelf and nested in a small corner. There are no fragrant flowers and touching colors. It's really ordinary and unremarkable, but I just saw it and saw it at a glance. The moment I looked at that flower, for no reason, I seemed to feel a sense of intimacy.

The headboard was always placed away from the door, which was very important to protect people from wild animals in ancient times.

3. Wanted Order: An old man with a white beard and a red robe often sneaks into residents' homes at night and places pleasant things. The discoverer should call the police immediately, and the alarm code is: Merry Christmas!

He often advises us not to leave our watches and rings at will to avoid being stolen.

4. Wanted Order: An old man with a white beard and a red robe often sneaks into residents' homes at night and places happy and deadly items. The discoverer should call the police immediately, and the alarm code is: Merry Christmas! You will get lifelong happiness in return. Christmas greetings.