Five jumbled up 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 and key in the number of that sentence as your answer.

The correct answer is: "Animals have an interest in fulfilling their basic needs, but also in avoiding suffering, and thus we bought to extend moral consideration. "

Step-by-step Explanation:
To identify the odd sentence, we need to analyze the logical links and flow of information between all five sentences to see which four can be combined into a coherent paragraph.

1. Identify the central theme:
All sentences revolve around the philosophy of animal rights, animal interests, and moral consideration, specifically referring to Peter Singer's arguments.

2. Establish the logical sequence of the coherent sentences:
• Sentence 4 is the best introductory sentence because it introduces the central subject and context: "The event that publicly announced animal rights as a legitimate issue within contemporary philosophy was Peter Singer’s Animal Liberation text in 1975."
• Sentence 2 follows Sentence 4 by elaborating on Singer's philosophical approach: "Singer viewed himself as a utilitarian, and presents a direct moral theory concerning animal rights, in contrast to indirect positions, such as welfarist views."
• Sentence 3 links to Sentence 2 by explaining his argument using the pronoun "He" to refer to Singer: "He argued for extending moral consideration to animals because, similar to humans, animals have certain significant interests."
• Sentence 5 flows directly from Sentence 3, starting with the phrase "As such" to conclude the argument about those interests: "As such, we ought to view their interests alongside and equal to human interests, which results in humans having direct moral duties towards animals."

3. Determine the odd-one-out:
Together, sentences 4 → 2 → 3 → 5 form a logically complete and tightly connected paragraph explaining Peter Singer's introduction of animal rights into contemporary philosophy and his specific argument. Sentence 1, while on a similar topic, is structurally redundant and does not fit into this logical sequence. Thus, it is the odd sentence.