Select the most appropriate option to fill in blank number 3.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. appear.
"Appear" means to become visible, come into sight, or be noticeable.
In the passage, sunspot groups appear to move across the Sun’s surface as it rotates, meaning they become visible in different positions over time.
Meaning of the other options:
Act: To behave in a certain way or take action.
Show: To display or exhibit something.
Shape: To form or influence something.
Hence, the chosen option is correct.