Answer:
Part carbon, part water, I am poison to the fishes. Many falsely claim my name, I am the pause that refreshes. What am I?
I am easy to waste and unstoppable. What am I?
I am the type of room you cannot enter or leave. Raise from the ground below I could be poisonous or a delicious treat.
I am very easy to get into,but it is hard to get out of me. What am I?
I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word.
Both old people and owls are said to be possessing this trait