Which of the following is made of matter?
a. the sun
b. light
c. heat
d. energy

Sun

Explanation:

Sun is made of matter. It is the nearest star and made of gas. It is a hot ball and constitutes of hydrogen. The Sun is so hot that it is converted into plasma.

The solid is first state of matter, when it is heated it is known as the second state of matter and gas is the third state of matter, and after this plasma is the fourth state of matter.

So, sun is made of plasma which is fourth state of matter.

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the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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