How do birds the plant seen here reproduce?
burs attach themselves to the birds, which carry the burs away.
burs prevent birds from feeding on the seeds of plants.
birds don’t damage plants with lots of burs.
birds only make nests in trees with burs.

Option A

Explanation:

Birds attach the bur of the plant which helps in the pollination. The birds sit on the plant and the burs of the plant gets attached in the legs of the birds which is transferred from one place to another.

Seeds at a different place will help in reproduction and growth of the plants. In this case the birds are carrier of the burs.

This is how the birds help in the reproduction of the plants by becoming the messenger.

every el niño cycle is different. every year.

multiply it by 5 in order for you to understand i cant give an exact answer.