Arrange the following sentences in the correct logical order to form a…

Concept: In a sentence-rearrangement question made up of several independent sentences, the correct order is the one where every sentence hands off cleanly to the next one — through a connective ("Moreover", "so"), a repeated or extended keyword, or a general-to-specific progression — with no sentence referring to an idea that has not yet been introduced, and no idea introduced without ever being used again.

Application:

1. Sentence 2 ("Cash transactions offer both privacy and anonymity...") makes a stand-alone claim about cash with no forward-pointing connective, so it can open the paragraph without needing anything stated before it.

2. Sentence 5 opens with "Moreover", which signals that it must directly extend a point already being made about money; it follows sentence 2 by generalising cash's privacy into a broader claim — money is worth what it is because we accept it.

3. Sentence 4 continues that same idea — money's worth resting on faith/acceptance — and pivots the discussion by adding "electronic money" to the sentence, which is exactly the phrase the next sentence needs to build on.

4. Sentence 1 is the only sentence that picks up "electronic money" and develops it into "electronic transactions" and "electronic commerce", introducing e-commerce as the paragraph's new focus.

5. Sentence 3 is the only sentence that uses "e-commerce" — the term sentence 1 just introduced — to state a requirement ("we need effective payment systems..."), which is why it must close the paragraph.

Cross-check: Reading the sentences straight through in this order — cash's privacy, money's acceptance-based worth, money's faith-based structure extending to electronic money, electronic transactions and e-commerce emerging, and finally what e-commerce needs — produces one continuous argument with no dangling connective and no sentence left unexplained; no other ordering keeps this chain intact, confirming the order 2-5-4-1-3.

Contrast: The order 1-2-5-3-4 wedges the payment-systems sentence between the acceptance-based-worth sentence and the faith-based-structure sentence, breaking the tight pairing those two sentences form (money's worth resting on acceptance/faith), and ends on the faith/electronic-money sentence as a disconnected closing thought rather than on the payment-systems requirement. The order 4-5-1-2-3 introduces electronic transactions and e-commerce in the middle, then goes back to cash's privacy point right before the closing sentence, breaking the forward movement of the argument. The order 4-3-5-2-1 uses "e-commerce" in the payment-systems sentence before electronic commerce has even been introduced, and closes on the sentence that introduces electronic transactions, leaving the paragraph without a proper conclusion.