Question

Some
time a sea and
and its tides
biological
reason,
appear red
give reason​

Answer 1

Answer:

Explanation:

Because when the sun gets to be sunset the colour of sun and sky get light colour which gives the colour red to the sea hope it helps you dear

Answer 2

Answer:

Red tides are caused by algae, which are tiny, microscopic organisms that grow in the water. Almost all bodies of water have some algae, but in a red tide, there is a lot more algae in the water than usual. In fact, the water changes colour in a red tide because the population of algae living in the water becomes so dense.

Red tides have been around since long before humans. However, certain human activities are making them more frequent.

Chemicals from farming, factories, sewage treatment plants and other sources can become dissolved in water on the land. This water, called runoff, eventually flows into the ocean and can cause algae to grow faster, leading to red tides.