# PTE SMW #3: The Three Zones of a Cave

Select Missing Word #3 - Level 1 - Feeds Listening

> You will hear a recording. At the end, the last word or words are replaced by a beep. Choose the option that best completes the recording.

- in temperature
- in appearance
- in air pressure
- in weather

## Answer

in temperature

## Explanation

The speaker describes the dark zone as "perpetually dark," so light never changes. The only change left is "slight seasonal change" in temperature. The option "in weather" is tempting because seasons bring weather. But a deep cave has no weather, only small shifts in how warm or cold it is.

## Hints

- Focus on the specific scientific variable the speaker is measuring or observing.
- Consider which of the options represents a measurable physical property of the environment.

## Transcript

The interior of a cave is divided into three zones. The entrance zone may serve as a place of shelter for animals or people. Prehistoric humans used entrance zones of caves as shelters and burial grounds. Therefore, such zones are of interest to archaeologists, as they provide clues to the habitat of early human beings. The next zone is called the twilight zone. The twilight zone is sheltered from direct sunlight and is home to a large, diverse population of animals, such as salamanders, bats, and during severe winters, bears. The third zone, the dark zone, is the true cave environment. Perpetually dark, it has only slight seasonal change.

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