According to Ayurveda the lifestyle of each individual needs to be carved out…

Concept: A detail-based reading-comprehension question is settled entirely by what the passage itself asserts. The reader locates the sentence that speaks to the exact proposition in the stem, reads off the criteria that sentence names, and matches those criteria against the options. Real-world plausibility, personal experience and outside knowledge carry no weight: an option can be perfectly sensible in life and still be wrong here if the passage never advances it.

Application: The stem asks what an individual’s lifestyle has to be built around. The passage answers this directly in its closing sentence:

“Each individual has to carve a lifestyle that considers the geographical region as well as the changing seasons.”

That sentence names exactly two criteria — the geographical region a person lives in, and the changing seasons. The option that reproduces both of them is “Their particular region and the changing seasons”.

Contrast with the near misses:

• “The things they like” — personal liking. The passage never makes individual taste the basis of a lifestyle; where it speaks of what is individual, it speaks of a person’s “mental and physical constitution”, not of preferences.

• “Sticking to a diet of fruits” — a fixed diet. The passage’s only remark on food-plants is that “for the people of a locality, the plants growing around them are the most suited”. That prescribes locality, not one food category.

• “What is cheaply available” — cost. Price never enters the passage at all; suitability is argued on ecological grounds, since “Ayurveda developed into an ecology-conscious system of healthcare”.

Cross-check: the same logic runs through the whole passage. Inner balance “can be maintained only by establishing harmony with the external environment”, and the human being is “made up of the same elements that make up nature”. The geographical region and the seasonal cycle are precisely the external, natural variables a lifestyle is being put in harmony with — so “Their particular region and the changing seasons” is the answer.