1). Merchants soon grew rich as the demand for products increased. 2). Trade…

Concept: A sentence-ordering (para-jumble) question asks you to rebuild a coherent passage from scrambled sentences by tracing the causal and chronological links between them — the sequence must open with the sentence that stands on its own without depending on any other sentence, and each later sentence must be the direct effect (or a further elaboration) of the sentence(s) already placed before it.

Application:

1. Sentence 2 states that trade began person-to-person and grew into a network across towns and lands — it depends on nothing else in the passage, so it must open the sequence.

2. Once trade reached that wider network, someone had to physically move the goods between now-distant buyers and sellers — sentence 4 (people found work transporting or selling the goods) is the direct consequence of the network described in sentence 2, so it comes next.

3. With that trading and transporting activity underway, demand for goods rose and the merchants handling them profited — sentence 1 (merchants grew rich as demand increased) follows from the transport-and-selling activity just established in sentence 4.

4. Finally, as a result of this richer, wider trade, ordinary people gained access to more kinds of goods — sentence 3 (people eventually got a greater variety of things to choose from) is the concluding effect and comes last.

Cross-check: Reading the passage in this order — 2, 4, 1, 3 — gives a smooth chain: the trade network forms, transport-and-selling work follows from it, merchants' wealth follows from that work, and the variety of goods available to people is the final outcome, with no sentence depending on information that appears later in the sequence.

This matches the sequence 2413.