A.Environment Education unit of Centre for Science & Environment has always…

Correct order and explanation:

• First: "Environment Education unit of Centre for Science & Environment has always been working towards providing easy to understand reading material." This sentence introduces the subject and so belongs at the start.

• Next: "Their new publication on this subject is an attempt to lend teachers a helping hand." This sentence must follow the introduction because the pronoun "their" refers back to the Environment Education Unit mentioned in the first sentence.

• Then: "It unfolds in two sections: Climate change: how to make sense of it all" followed immediately by "And natural resources how to share & care." These two sentences form a pair describing the publication's sections; the second begins with "And," so it clearly follows the first.

• Finally: "However, they are introduced to students not as a paragraph to memorize but as an activity to do." This sentence provides a concluding contrast about how the material is presented, so it naturally comes at the end.

Putting these explanations together yields the correct sequence of the sentences in the passage.

Common errors to avoid:

• Starting with the sentence that begins "And natural resources..." is incorrect because it depends on the preceding sentence for context.

• Separating the two section sentences breaks their logical connection and confuses the reader.

• Placing the concluding sentence in the middle removes its contrastive effect and disrupts the paragraph's flow.