Which principle(s) best explains why adding "even a penny will help" will increase the success of fundraising requests?

Question

Quizplus · Accepted Answer

Adding the phrase "even a penny will help" would appeal to the principle of commitment and consistency by encouraging potential donors to commit to giving some amount, even if it is a small one. This commitment may make them more likely to follow through with a larger donation in the future.

Which Principle(s) Best Explains Why Adding "Even a Penny Will