Explanation:

- Option 1: They form from the accumulation of organic material

- This option refers to organic sedimentary rocks, not chemical sedimentary rocks. Examples include coal and limestone formed from accumulated biological debris like plants or shells.

- Option 2: They form under high pressure and temperature

- This describes metamorphic rocks. They are formed through the alteration of existing rock types in the earth's interior due to high temperature and pressure.

- Option 3: They are created from dissolved materials that precipitate from a solution

- Correct Answer: This is the main characteristic of chemical sedimentary rocks. They form when minerals dissolved in water precipitate out of the solution, such as in the formation of rock salt or gypsum.

- Option 4: They are composed of fragments of other rocks

- This statement describes clastic sedimentary rocks, which are made of particles derived from the weathering and erosion of pre-existing rocks. Examples include sandstone and conglomerate.