Matter is everything around you. All matter has mass and volume. Which of these choices is an example of matter?

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.

Tell me the answer choices and i would be able to answer. : )

Steel shot weighs about two-thirds as much.hoped i can i get brainliest