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.