Decreases in membership at the club are affecting the ability of the club to maintain its staff.

decreasing in membership at the club is affecting

affecting the decrease in members are

the decrease in members at the club were affecting

the decrease in members from the clubs are affecting

no improvement or correction is required.

This is the correct one:

Decreasing in membership at the club is affecting ...

The original, Decreases in membership at the club are affecting the ability of the club to maintain its staff, is not correct because Decreases should not be in plural form.

Affecting the decrease in members are : this does not make any sense

The decrease in members at the club were affecting : subject and verb disagreement

The decrease in members from the clubs are affecting : subject and verb disagreement

The answer is "he was bad enough in all conscience, but the devil himself could not temp him to turn slave-trader. satirical is a synonym for sarcastic. so when the author says that tom walker could not be tempted by the devil he does not literally mean "the devil" but he means that he is too morally upright to become a slave-trader.