Russia, Kazakhstan, Turkmenistan, Iran and Azerbaijan all border the Caspian Sea.
Carbon dioxide is the waste product of animal respiration, and is released by volcanos.
Explanation:
Make an observation.
Ask a question.
Form a hypothesis, or testable explanation.
Make a prediction based on the hypothesis.
Test the prediction.
Iterate: use the results to make new hypotheses or predictions.
Answer:
What sentence? I mean where are the sentences.
I think you didn't complete the question mate!