Fill in the blank (4) with the appropriate word form the options below:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. security.
Security refers to the state of being free from danger or threat, which fits the context of concerns about online safety and privacy.
The other options—insecurity (lack of safety), vigilance (watchfulness), and incursion (an invasion or attack)—do not fit as well in this context.