Correct, they would be Ella,El, etc. but common ones are: Ellos, singular, and ustedes.
Answer:
sorry I would like to help you but I don't speak Spanish
lo siento quisiera ayudarte pero no hablo español
Las inundaciones, la sequía, la contaminación del aire y del agua son algunos efectos del cambio climático.
It is option B (climate change) because it is the one that makes the most sense. Climate change can cause <u>meteorological disasters</u> (strong winds, droughts, fires...).
<h3><em><u>MissSpanish</u></em></h3>
