Bias is having emotional input or a preconceived notion of something.
example: you are judging a contest and your best friend is in that contest. you would want your friend to win, therefore you have bias
Immune System. Its like the Army for your body!
The answer is D its the right answer because on the moon there is not oxygen for it to reach that state
Decomposers break down dead animals and plants. They usually benefit producers by releasing nutrients back in the soil.
I honestly think that a or d would be the best options. I would start with D and if that doesn't work try a.