Rearrange P, Q, R, S to form a coherent sentence: P: are more defensive than offensive and / Q: although most social movements / R: tend to be temporary, they / S: are important agents of social transformation

Reading the parts: 'although most social movements (Q) are more defensive than offensive and (P) tend to be temporary, they (R) are important agents of social transformation (S).' This yields a logical sentence. Q introduces 'although most social movements', P gives the first descriptive clause, R completes 'tend to be temporary, they', and S concludes with the main assertion. Hence the correct order is Q P R S, option (b).