Well, since C is the only example where a positive thing happens, then it is certainly not a potential problem, so 'they can provide a lot of energy for people to use' is the correct answer. The other examples are problematic.
Answer:
D
Explanation:
have/has/had been (v.) is one of the structure of passive voice
Answer: Rainsford believed this because Zaroff stopped and his eyes climbed up the trunk of the tree. But his eyes stopped before he reached the limb where Rainsford lay and he smiled. Then he blew a smoke ring towards the tree and walked in the opposite direction. It’s obvious that Zaroff knew he was there, but was trying to prolong the game.
Answer:
It is the concept pf surface tension that helps the coin to float on the top of the water in the glass. The surface tension acts just opposite to the gravitational force and that is why when any metal placed in the water it will float and come on the surface.
Brainly Plz
