Answer: paradox
Expiation: It is clearly sand so it is obviously found to be true, which is what makes it a paradox
To be honest, it's a little confusing myself, hehehe. But I believe that C might be the right answer or B. You might have to wait for other answers besides mine.
Answer:
Read Explantion.
Explanation:
Hey, could you please give us the story/images? So we can get a hint and clue for the answer?
Study harder or look on the internet ok
