Which of the following is the most likely way for bacteria and viruses to enter a water supply?

Increased photosynthesis releases bacteria and viruses

Poor sanitation habits cause water to mix with sewage

Water from a burst dam sweeps particulate matter into a nearby river

Chemical fertilizers dumped into the water attract bacteria and viruses

is it b

I would bet on b

but around here the problem is sea gulls

Based on the provided options, the most likely way for bacteria and viruses to enter a water supply is poor sanitation habits causing water to mix with sewage.

Explanation:
To determine the most likely way, we need to analyze each option.

1. Increased photosynthesis releases bacteria and viruses: This option does not seem likely. Photosynthesis is a process by which plants use light to convert carbon dioxide and water into oxygen and glucose. It does not inherently involve the release of bacteria and viruses into a water supply.

2. Poor sanitation habits cause water to mix with sewage: This is the most likely way for bacteria and viruses to enter a water supply. Poor sanitation practices, such as inadequate separation of sewage and drinking water sources, can lead to contamination of the water supply with harmful bacteria and viruses.

3. Water from a burst dam sweeps particulate matter into a nearby river: While this option could introduce particulate matter into a water supply, it does not directly address the introduction of bacteria and viruses. Bacteria and viruses would typically be associated with human or animal waste rather than particulate matter from a burst dam.

4. Chemical fertilizers dumped into the water attract bacteria and viruses: While chemical fertilizers can contribute chemicals and nutrients to water bodies, leading to environmental impacts, they do not directly attract bacteria and viruses. Bacteria and viruses are primarily introduced through fecal matter or other sources of contamination rather than chemical fertilizers.

Therefore, the most likely way for bacteria and viruses to enter a water supply is through poor sanitation habits causing water to mix with sewage.