Fill in the blank (5) with the appropriate word form the options below:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. wary.
Wary means being cautious or watchful, which fits the context of being alert about online activities.
The other options—absurd (ridiculous), obscure (unclear), and oblivious (unaware)—do not match the intended meaning of being cautious or vigilant.