Five jumbled sentences (labelled 1, 2, 3, 4, and 5), related to a topic, are given below. Four of them can be put together to form a coherent paragraph. Identify the odd sentence out and key in the number of that sentence as your answer.

The correct answer is the sentence: "The profound emotional impact of music has inspired ongoing research into its relationship with emotions."

To identify the odd sentence out, we must look for a common theme that connects the majority of the sentences to form a coherent paragraph, and then find the one sentence that breaks this flow.

Let us analyze the overarching theme of the other available sentences:

1. "Music is a universal phenomenon that utilizes a myriad brain resources."
2. "The proclivity to create and appreciate music is ubiquitous among humans, permeating daily life across diverse societies."
3. "This inherent connection to musical expression is deeply intertwined with human identity and experience."

These three sentences share a very specific and unified central idea: the universality of music in human society and its deep, biological, and cultural connection to human nature. They logically flow into one another, building a paragraph that describes music as an inherent, ubiquitous part of the collective human identity.

Now, let us examine the remaining sentence:

"The profound emotional impact of music has inspired ongoing research into its relationship with emotions."

While this sentence is certainly about music, its specific focus deviates from the rest of the group. Instead of discussing the universality of music as a human trait, it introduces the specific topics of "emotional impact" and academic "ongoing research." This shifts the context from a broad, philosophical, and anthropological view of music to a specific scientific and psychological inquiry. Because it does not align with the core theme of music's universality and its tie to human identity established by the other sentences, it is the odd one out.