Anything you create, you own.
Other people can't use your stuff without permission.
This goes for things other people have created too.
You can't use their work without permission.
Permission is something in writing saying you can use the work.
If a creator is happy to share, they will say so. Often by attaching a special license to their work.
If you use their work you need to attribute it to them (give them credit)
There are different Creative Commons Licenses that creators use to share their work.
By Boyoung Chae, licensed under CC-BY 3.0.
Copyright eventually expires. In NZ it expires 50 years after the author's death.
Sometimes creators choose to release their work absolutely free.
When these things happen the work is in the public domain. Anyone can use it and you don't need to attribute it. (You still need to show your teacher where you got it).
It is OK to use copyrighted things without permission sometimes. This is called Fair Dealing.
The exceptions are:
Research
Private study
Criticism or review
Reporting current events
You may not use any content (text, images, models, sounds etc) unless you:
Made it yourself
Have permission (and attribute it)
Know that it is in the Public Domain (and show your teacher)
Are using under Fair Dealing (Criticism or review)
This is messy. The law is different in different countries.
In New Zealand the person driving the AI owns the copyright.
You will not be violating copyright by using AI generated content that you created.
You are violating copyright by using AI generated content created by someone else.
But:
AI content is not your work. Check with your teacher about whether it is appropriate for the project you are doing
By Ben Britton, Hutt Valley High School, licensed under CC-BY. Created with Gemini
When you do a Google Image search you can use the 'Tools' on the right to filter based on licences. This will find images that are tagged with Creative Commons licences. You still need to find the licence.
Then there are sites that provide images with appropriate licensing, some examples below...