The largest inland body of water in Russia is a saltwater sea. Volga Caspian Mediterranean Baikal

## Step 1<br />The question is asking for the largest inland body of water in Russia. The options provided are Volga, Caspian, Mediterranean, and Baikal. <br /><br />## Step 2<br />The Volga is a river, not a body of water. The Mediterranean is a sea, but it is not located in Russia. Baikal is a freshwater lake, not a sea.<br /><br />## Step 3<br />The Caspian Sea is the largest inland body of water in Russia. It is also the largest inland body of water in the world, covering approximately 371,000 square kilometers. It is a saltwater sea, which matches the description in the question.