Bile is a greenish alkaline liquid which is stored in the

Explanation

The gallbladder stores bile, a greenish-yellow digestive fluid that helps break down fats in food: 

The gallbladder is a small, pear-shaped organ located beneath the liver. Bile is produced in the liver and travels through ducts to the gallbladder, where it's concentrated and stored. When food is eaten, the gallbladder contracts and releases bile into the duodenum to aid digestion. 

There is an explanation video available .