# PTE ASQ #8: Biological Necessity of Oxygen for...

Answer Short Question #8 - Level 1 - Feeds Listening

> You will hear a question. Please give a simple and short answer. Often just one or a few words is enough.

## Answer

Oxygen

## Explanation

The correct answer identifies oxygen as the essential gas. Most animals rely on aerobic respiration, a process that requires oxygen to convert nutrients into energy for cellular function.

What to watch: The key words are "gas" and "survival of most living animals." Animals breathe in "oxygen" to live. One word is enough. Avoid "air," which is a mix of gases, not one gas.

## Hints

- Consider the gas that humans and most other animals inhale to breathe.
- This gas is a byproduct of photosynthesis in plants and is vital for aerobic respiration.

## Transcript

What kind of gas is necessary for the survival of most living animals?

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