Read the following paragraphs on my least favorite food in the world and highlight the following things: The central idea in blue
The main idea of each paragraph in yellow

An Ancient Veggie
By Martha Black

Onions have been around for a long time. In fact, scientists agree that onions were likely a staple in the prehistoric diet.
Onions are known to have existed in Egypt in 3500 BC. To the ancient Egyptians, onions symbolized eternity, and many pharaohs were buried alongside onions.
The ancient Greeks also believed in the power of onions. In fact, in the first century AD, a Greek physician convinced several Greek athletes that onions had a medicinal property that would make them stronger. As a result, the majority of athletes who participated in the first Olympic Games ate several pounds of onions, drank onion juice, and rubbed onions over their bodies.
In the Middle Ages, onions were prescribed to alleviate headaches and to prevent hair loss. They were also acceptable forms of payment for goods and services. They were even commonly given as wedding gifts!
Today, onions are primarily used to add flavor to our foods. Furthermore, all evidence indicates that they will continue to exist far into the future.