Why we should use diaphragm to singing? i've heard that the diaphragm force the oxygen to lungs? is it true?

Your diaphragm is important for singing, because it hold air in the body, which allows the singer to let out and control the notes they sing, whether high or low, while singing without putting little to no strain on their throat.

so, not gonna do the actual thing because that's just laziness for an easy assignment like this.

but someone that has a lot of information and interesting details about is picasso. you can easily write a 500 word essay about him and how overtime his paintings of himself got more and more deformed representing that he was forgetting what he looked like and that was from memory.