Her favorite color is blue.

Chromium has the property of changing color depending on its oxidation state.

Understanding the characteristics of that plant is very important for growing it.

His attitude suddenly changed.

I'm worried about his health condition.

He was holding my hand tightly.

He was running while holding a bag.

He always carries an umbrella around.

Oxidation is a type of chemical reaction where a substance reacts with oxygen to form an oxide.

This compound turns red when it oxidizes.