The correct answer is option 2.

This means that an object is made up of two equal parts by volume.

Let`s analyze the other options to understand why they are not correct:

Option 1: This option is not correct because it does not state that the object is divided into two equal parts by volume. It could mean that the object is divided into two parts, but those parts might not be equal in volume.

Option 3: This option is not correct because it does not mention any division or splitting of the object. It could mean that the object is made up of multiple parts, but there is no mention of equal volumes.

Option 4: This option is not correct because it implies that the object is made up of four parts, not two.

In conclusion, the correct answer is option 2 because it states that the object is made up of two equal parts by volume.