What is the difference between red onion, onion and onion?

Update:26-10-2019
Summary:

The difference between red onion, onion and onion is as […]

The difference between red onion, onion and onion is as follows:

Onions and onions are the same thing. Onions, alias ball onions, onions, jade onions, onions, Dutch onions, leather teeth, etc., Liliaceae allium is a biennial herb. In the shape of a ball.

Red onion is a red onion herb of the family Iris. The leaves are mostly lanceolate or broad-lanceolate, and umbel-like cymes are born at the top of the stem.