A teacher asked the students of class V to read the text thoroughly. Then she asked them to answer the questions with reference to the context (RTC). In this process she is encouraging students for _____.

Reading the text thoroughly and answering RTC (reference-to-context) questions requires deep, careful reading to understand specific portions in detail — this is intensive reading. Skimming and scanning are quick reading techniques, and extensive reading is broad reading for pleasure/general understanding.