Comprehension:

In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank. The basic elements of computers that (1)________ our world are explained in an interactive manner. The book has a (2)________ approach of colourful and creative picture-based activities. The puzzles, activities and mazes (3)________ the students to develop critical thinking, logical and motor skills. After every lesson, (4)________ exercises are incorporated to (5)________ the conceptual understanding of the students.

Select the most appropriate option to fill in blank no. 1.