(1) The expression 'to no end' from the text means 'extremely' or 'to a great extent.' In the chapter, 'arouses curiosity to no end' is used. Here, it means the person has read stories to a great extent. (2) The expression 'came into existence' from the text means 'was formed' or 'originated.' In the chapter, it describes how the Lonar Crater Lake 'came into existence when a colossal meteorite...crashed into the Earth.' (3) The expression 'leaps and bounds' means 'rapidly' or 'significantly.' Though not explicitly in the main text, it appears in the vocabulary section (binomials exercise) and fits the context of improvement through hard work. (4) The expression 'age-old problem' from the text means 'a long-standing problem.' In the chapter, living root bridges are described as 'an innovative and indigenous solution to solve this age-old problem' of crossing waterways during monsoons. (5) The expression 'in disbelief' from the text means 'unable to believe what one sees.' In the chapter, it describes how 'This unusual place creates an optical illusion...a sight that has left tourists in disbelief for years.' (6) The expression 'in full glory' from the text means 'in complete beauty' or 'at its best.' In the chapter, the Valley of Flowers is described as 'a place where nature blooms in its full glory offering an attractive view.'