What an effective example does
An example turns an abstract reason into a concrete situation and shows why it supports the point.
Many body paragraphs include an example while the link between the example and the claim is missing.
Short answer: the example must show how it proves the claim; otherwise it is only inserted information.
The paragraph says many people or some countries and still needs a concrete situation and result.
The example appears; it still needs to show how it supports the previous reasoning.
Invented statistics are used to sound evidence-based, which weakens trust.
An example turns an abstract reason into a concrete situation and shows why it supports the point.
Write claim, reason, example, then consequence. The final step is often missing, which is why the paragraph feels thin.
If examples drift away from the claim, rewrite one body paragraph and add a consequence sentence after each example.
These pages explain the Banfen Writing diagnostic and blocker-repair method, Task 1 overview, Task 2 development, and common score blockers.
If every paragraph has examples but still feels underdeveloped, the issue is probably the link between example and reason.