Which of the following is an effect of non-biodegradable substances in water bodies?

The correct option is Clogs drains and harms aquatic life.

Explanation:

Non-biodegradable substances are materials that cannot be broken down or decomposed naturally by biological organisms such as bacteria and fungi. Examples include plastics, synthetic polymers, and heavy metals.

When non-biodegradable wastes enter water bodies:

1. They physically block and clog drainage systems, disrupting natural water flow.
2. Aquatic animals often mistake plastic debris for food, which can lead to ingestion, internal injuries, blockage of their digestive tracts, and eventual death.
3. Toxic chemicals released from these substances pollute the aquatic ecosystem and accumulate in food chains.

Therefore, non-biodegradable substances clog drains and pose serious threats to aquatic life.