Question

Why the veins of plants turned red ? What does it indicate ?​

Answer 1

Answer:

The red colour is caused by pigments called anthocyanins. Most plants have naturally low levels of these pigments and appear green most of the time. However, in certain situations these 'green' plants will produce higher levels of anthocyanins leading to a change in colour in their stems and leaves.

hope it helps

Answer 2

Explanation:

acid + blue litmus = red, this is why