: Despite genetic findings, experts like Professor Ian Caterson emphasize that for the majority, the most effective solution remains a change in diet and increased exercise . Questions & Answer Key

Happy studying, and remember—in IELTS, every gram of knowledge counts! 😉

| Word | Definition | Example from the passage | | :--- | :--- | :--- | | | An object made by humans, typically of historical interest | “The physical artifact known as Le Grand K.” | | Drift | Gradual change or deviation | “The worrying drift in mass over decades.” | | Calibrate | To adjust or mark precise measurements | “Scientists calibrate instruments against the standard.” | | Invariant | Never changing; constant | “Seeking an invariant natural constant.” | | Prototype | An original model on which later versions are based | “The international prototype kilogram.” |

To help you understand where the answers come from, here is a short simulated version of “A Weighty Issue.” Read it quickly, then study the answers below.

: Referencing the shift away from purely behavioral modification. Heading Matching (Paragraph Highlights): Paragraph C