Select the most appropriate option to fill in blank number 5.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. observations.
Observations refer to the act of carefully watching, monitoring, or recording data, especially for scientific analysis.
In the context of the passage, "observations" made by satellites refer to recorded data and findings about the Sun’s sunspot activity.
Meaning of the other options:
Perceptions: The way something is understood or interpreted.
Inspections: Careful examinations or investigations.
Invalidations: Acts of proving something wrong or making it invalid.
Hence, the chosen option is correct.