What makes the water in Australia’s Hutt Lagoon appear bright pink?

Here is the question :

WHAT MAKES THE WATER IN AUSTRALIA’S HUTT LAGOON APPEAR BRIGHT PINK?

Here is the option for the question :

• Sand
• Pollutants
• Algae
• Salt deposits

The Answer:

And, the answer for the the question is :

Explanation:

[STC009979]. About five hours’ drive to the north of Perth, the marine salt lake known as Hutt Lagoon can be found on the coast of Western Australia, close to the Indian Ocean. Its pink Pepto-Bismol-like hue originates from a naturally occurring algae that produces carotenoids and is a rich source of vitamin A. This algae is known as a carotenoid producer. The water at Hutt Lagoon has a pinkish hue throughout the year, although the color is at its most brilliant on bright days. The view from the lakeshore is magnificent, but the view of the lake from above is even more breathtaking. Take a flight over the area to get a bird’s-eye view of the dramatic contrast between the bright blue ocean and what appears to be a lake filled with strawberry milk.