Answer:
Part carbon part water I am poison to the fishes. Many falsely claim my name I am the pause that refreshes.
I have memories, but none of my own. Whatever's on my inside is what is shown. If I'm ever different, it's because you changed me. I feel like a decoration, here for you to arrange me. What am I?
I suck.
I have a lot to say but can't be heard because I can't speak one single word. What am I?
Squeeze me and I cry tears as red as flesh, but my heart is made of stone. What am I?
Give it food and it will live, give it water and it will die.