The correct sentence would be: "The increasing concerns about climate change point to the need for enhanced efforts towards achieving sustained growth."

In this context, "achieving" is the correct gerund form to convey the idea that efforts are needed to accomplish or attain sustained growth. The other options do not fit grammatically or idiomatically in this sentence.

• "Extend" means to prolong or lengthen, and it is the most suitable term when referring to a deadline.
• "Increase" and "enlarge" are more commonly associated with quantity or size and are not typically used to describe extending a deadline.
• "Broaden" means to widen in scope, and it doesn't convey the idea of extending a specific time limit.

"Scent" refers to a pleasant or distinctive smell, especially a pleasant fragrance or aroma. It is the appropriate term to describe the quality of the French perfume in this context.

The other options, "sent," "send," and "cent," have different meanings. "Sent" is the past tense of the verb "send," "send" is a verb meaning to dispatch or transmit something, and "cent" is a unit of currency. None of these fit the context of describing the quality of a perfume.

(D) frantically

• "Frantically" is the most suitable option to convey a sense of urgency and speed.