Which of the following defines matter?

The definition of matter is accurately captured by stating that it is anything that has mass and occupies space. This means that for something to be classified as matter, it must possess weight (which is influenced by gravity acting on its mass) and take up physical space in the universe. This encompasses all forms of matter, including solids, liquids, gases, and plasmas.

The other options fail to encompass the full definition. For example, the notion of having weight but not volume does not hold true, as weight is contingent on the presence of volume; without volume, an object cannot have a measurable weight. The description that matter is any physical substance that can be seen or touched is misleading, as there are forms of matter, like gases, that cannot always be seen or touched directly. Finally, limiting matter to only elements and compounds excludes other forms, such as mixtures and various states of matter, which also contain mass and occupy space. Thus, the comprehensive and scientifically accepted definition of matter aligns with the correct answer provided.