Methylmercury, a common mercury compound, is frequently found in what animal? A fish B cattle C pigs D chickens

## Step 1<br />Methylmercury is a compound of mercury that is formed when mercury is converted by bacteria in the environment. This compound is particularly harmful to the nervous system and is a significant environmental concern.<br />## Step 2<br />Methylmercury is known to bioaccumulate in certain animals, particularly those that live in water. This means that the concentration of methylmercury increases in these animals over time, as they consume other organisms that have already accumulated the compound.<br />## Step 3<br />Among the options provided, fish are known to bioaccumulate methylmercury. This is because they live in water and consume other organisms that have already accumulated the compound.<br />## Step 4<br />Therefore, the correct answer is A, fish.