The answer is A. Hope this helped.
Answer:
is mum going horse riding?
-No she isn't
Am I doing well?
-No I'm not
Are you swimming?
-Yes you are
Are you and Emilia playing volleyball?
-Yes we are
Are Jesse and Lexi waiting for a bus now?
-Yes they are
Is Ben doing athletics at school today?
-Yes he is
Can you give me some more information. I am not able to understand the question.
It's when you have too much nutrients in a lake or pond mainly from runoff in big rain storms, this can cause plants to grow more than normal and kill the fish in it for lack of oxygen.