Reading
Re-order Paragraphs — practice #reorder-010
The text boxes below are in the wrong order. Restore the original order by dragging them.
Re-order Paragraphs
Untimed practiceThe text boxes below are in the wrong order. Restore the original order by dragging them.
Drag the boxes into the correct order — or use the arrows.
1A keystone species is one whose presence holds an entire ecosystem together in delicate balance.
2Sea otters, for example, feed on the urchins that would otherwise devour underwater kelp forests.
3Without the otters, the urchin population explodes and strips these forests almost bare.
4Such collapses demonstrate how the loss of a single species can ripple through an entire habitat.
Practice sample modelled on the official PTE Academic format — not a real exam question, and not affiliated with or endorsed by Pearson. Confirm current rules at pearsonpte.com.