Are These Considered Pre-Cancels? What Are These Marking?

Hi, are these called cancels? Thank you from a stamp learner.

I think not, they are cancelations // postmarks. I'll leave it to an expert to explain the two. Definitely not precancels though.

Top and bottom are slogan postmarks, cancelled that way while the stamp was in use. The middle one is a 'dumb cancel' which contains no date or location details, but is still just a cancellation.

I quite like the bottom one. Nicely positioned on the stamp.

The first and third are parts of normal cancels called slogan cancels or machine slogan cancels. The wording replaces the usual straight or wavy bars, and was used for publicity including various charitable campaigns. There are many different kinds with varieties.

This one happens to have a pictorial element:

See also:
https://goscf.com/t/14341
and other threads.

The second cancel is a double oval, a standard style used for many years. This is called a mute (or dumb) double oval, as others will have the city, state and sometimes office name. This was multipurpose, used on packages, registered mail, mail that missed cancellation by a machine, etc.