In multicellular organisms, cells and organ systems are specialized to perform specific tasks. For example, the respiratory system in animals and the shoot system in plants allow these organisms to take in the atmospheric gases they need and release the waste gases.

Systems of Gas Exchange

Explanation:

Animals gas Exchange as a part of the example such as plants. Carbon dioxide and Oxygen move by dispersion across clammy films. In basic Animals, the trade happens legitimately with the earth. Fishes utilize outward expansions of their body surface called gills for gas trade.  Unicellular living beings don't have this capacity. They should detect their environmental factors in different manners.A few microorganisms can identify synthetic compounds, for example, sugar, in their condition and advance toward them. Photosynthetic protists, similar to Euglena, can identify light utilizing uncommon sensors.  When the  air moves all through the lungs.it is called Ventilation.

The answer is option b.