Which of these items is the heaviest?

Explanation

10 kg carrots are heaviest, as the other items weigh less. 1 kilogram, or 1 kg, weighs the same as 1000 grams (g). As the 1 litre of milk is mostly made up of water, and 1 litre of water weighs 1 kg, 1 litre of milk weighs around 1 kg.