During the rainy season, the ground becomes slippery primarily due to the dense growth of Blue green algae (also known as Cyanobacteria). These organisms thrive in the moist, humid conditions provided by the monsoon. Their slipperiness is caused by:

Mucilaginous Sheath: They produce a gelatinous or slimy sheath (made of mucopeptides and polysaccharides) around their cells to retain moisture and protect against drying.

Water Absorption: This sheath absorbs water and becomes extremely slick, reducing the friction between the ground and surfaces like shoes.

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