Concept: This question requires choosing the adjective that best fits the context of "security arrangements" and "areas" where they might be tightened.
Step 1: Understand the context The sentence talks about tightening security arrangements. This is usually done in areas that are vulnerable, important, or prone to issues.
Step 2: Meanings of the adjectives in the options
(1) sensible: Having or showing good sense or judgment; practical and functional rather than decorative. (e.g., "a sensible decision," "sensible shoes").
(2) sensual: Relating to or gratifying the physical senses, especially sexual senses. (e.g., "sensual pleasure," "sensual lips").
(3) sensitive: % Option (A) Quick to detect or respond to slight changes, signals, or influences. % Option (B) Easily damaged, injured, or distressed by slight changes. % Option (C) Requiring careful handling due to its delicate, secret, or controversial nature; potentially volatile. (e.g., "sensitive information," "a sensitive topic," "sensitive equipment," "a sensitive area/zone").
(4) sensational: Causing or trying to cause great public interest and excitement, often by exaggerating or distorting details. (e.g., "sensational headlines," "a sensational trial").
Step 3: Choose the best fit for "areas" requiring tightened security
"Sensible areas": Doesn't fit well. Areas are not usually described as sensible in this context.
"Sensual areas": Completely inappropriate for security context.
"Sensitive areas": This fits perfectly. "Sensitive areas" are locations that are vulnerable, important, or require special protection due to potential risks (e.g., border areas, government buildings, areas prone to conflict). Security is often tightened in such areas.
"Sensational areas": Doesn't fit. "Sensational" relates to causing excitement or shock, not directly to the need for security in this manner. Although both "sensitive" and "sensational" were circled in the image, "sensitive" is the standard and most appropriate adjective in this context. Security is tightened in areas that are considered "sensitive" due to their nature or potential for problems.