Final answer:
The sentence fragment is 'Are dry after such a severe drought'. It is missing a subject, and therefore, does not form a complete thought. Option B is a complete sentence and does not represent a sentence fragment.
Step-by-step explanation:
The sentence fragment from the options provided is Are dry after such a severe drought. A sentence fragment is a group of words that does not express a complete thought or lacks either a subject, a predicate, or both. Option A lacks a subject who or what is dry while option B, Sugar and salt dissolve easily in water, is a complete sentence with both a subject and a verb, and clearly conveys a complete thought.
Discussing the properties of substances like sugar in water relates to their ability to dissolve, creating a stable mixture, also known as a solution. Sugar, or sucrose, dissolves in water and does not settle out of the solution, which is indicative of a true solution.
When sugar is dissolved, it is spread evenly throughout the water, making the mixture homogeneous, and the small size of the sugar particles, typically less than 1 nm in diameter, is a reason why they remain dissolved and do not get trapped by a filter.