What is not the functions of the atmosphere?

Correct option is D

The correct answer is (D) Occurrence of seasons and day length variation
Explanation:

• The occurrence of seasons and the variation in day length are primarily caused by the Earth’s astronomical movements, namely its revolution around the Sun and the tilt of its axis (23.5^∘).
• Due to this axial tilt, different parts of the Earth receive varying amounts of solar radiation throughout the year, resulting in seasonal changes.
• The atmosphere only modifies the intensity of heat by trapping and redistributing energy, but it does not cause the seasons.
• The other options are direct functions of the atmosphere.
• It acts as a reservoir and transport medium for water vapour, supporting the hydrological cycle (Option A).
• It supplies CO₂​ for photosynthesis and O₂ for respiration, which are essential for life processes (Option B).

Information Booster:
• The atmosphere is divided into layers: Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere. All weather phenomena occur in the Troposphere.

Additional Knowledge:

• The greenhouse effect is the process by which the Earth’s atmosphere traps heat and maintains a suitable temperature for life.
• Greenhouse gases such as CO₂, methane CH₄, water vapour and nitrous oxide absorb outgoing long-wave (infrared) radiation from the Earth’s surface.
• These gases re-radiate heat back toward the surface, preventing excessive loss of energy into space.
• As a result, the Earth remains warm enough to support living organisms and sustain ecological balance.