Directions: Each of the following items in this section consists of a sentence, parts of which have been jumbled. These parts have been labelled as P, Q, R and S. Given below each sentence has four sequences, namely (a), (b), (c) and (d). You are required to re-arrange the jumbled parts of the sentence and mark your response accordingly.

To understand climate change (P) / scientists analyze data from various sources (Q) / including ice cores, tree rings, and satellite observations (R) / to piece together Earth’s climate history (S).