Seems unprepared.

Pausing too much.

Repetitive "um"s and "like"s.

Looking down at the screen.

Informal language.

Normally you shouldn't say that this is your argument, the argument should be clear to the audience.

Miss Riosa, next time you could have practiced a little more.

umm

Next time work a bit on your enthusiasm

Please read your text before you speak

work a bit on your topic sentence and don't repeat the exact thing

Work a bit on your enthusiasm

You shouldnt talk to yourself out loud

Your language is too informal

Try to sound a bit more lively and try rehearsing your speech before perfofrming

Next time use eye contact

Try and gain more knowledge on your subject of speech before you write

Try and speak more clearly and smoothly

Try and slow down and put a little more emphasis on the words

Next time don't use casual words such as: like

Maybe use more emotive language and persuasive techniques

Chooses persuasive techniques that are relevant

Be clear about your contention

Use legitimate sources

Don't sure so any "umms" and "likes"