Not very often, but sometimes, the language gives away the question. This is one such instance.
Look at A. Is digestion a bad thing? It shouldn't be. Otherwise you run marathons with gobs of food not being broken down and providing energy.
Not A.
Not C. Do you like yogurt? If you don't do you know someone who does? Is yogurt for you/them a bad thing. Bacteria here are good. Again, not C.
Not D. Waste is bad. It's a problem. Getting rid of it is good. Again not D.
There's only one left.
B <<<< answer. Who would like to get strep throat. It's a fate for your worst enemy.
B <<<< answer.
The second one, the third one, and the fourth one
Answer:
Yes. There must be a difference.
Explanation:
The part of water with low density (warm or hot) would rise, and the cold water would sink. This creates a convection.
Acceleration is a measure of the change in velocity of a moving object. :)
Don’t worry, you’re right :)