Why is high pressure used in the Haber process?

High pressure is used in the Haber process to increase the rate of reaction and to shift the equilibrium position towards the production of ammonia, as it favors the formation of fewer gas molecules.

A strong answer should directly address the approved learning objective to recall typical Haber process conditions of about 450 degrees Celsius and about 200 atmospheres. (Chemistry only). This question belongs to The Haber process within The Haber process and the use of NPK fertilisers, so the response should use that exact curriculum context rather than a generic statement. The answer is correct when it names the key idea, explains the link to chemistry only, and keeps the wording specific to AQA GCSE revision.