Given below are four jumbled sentences. Select the option that gives their correct order.
(1) However, they are introduced to students not as a paragraph to memorize but as an activity to do.
(2) Environment Education Unit of Centre for Science & Environment has always been working towards providing easy to understand reading material.
(3) Their new publication on this subject is an attempt to lend teachers a helping hand.
(4) It unfolds in two sections; Climate change : how to make sense of it all and Natural resources : how to share and care.