Swimming is conducive . . . . . . . . health. A. at B. to C. for D. on

The correct answer is: Swimming is conducive to health.

The word “conducive” means “helpful or leading to a particular result.” In this case, swimming is helpful or leads to good health.

The other options are not correct because they do not make sense in the context of the sentence.

• “Swimming is conducive at health” does not make sense because “at” is not a preposition that can be used with the word “conducive.”
• “Swimming is conducive to” is the correct answer because it is a preposition that can be used with the word “conducive.”
• “Swimming is conducive for” does not make sense because “for” is not a preposition that can be used with the word “conducive.”
• “Swimming is conducive on” does not make sense because “on” is not a preposition that can be used with the word “conducive.”

In conclusion, the correct answer is: Swimming is conducive to health.