Final answer:
LSA-II is a material with low specific activity and less uniform distribution, but it is nondispersible and insoluble.
Step-by-step explanation:
A material that has a low specific activity and that activity is less uniformly distributed, but the material is nondispersible and insoluble, best describes LSA-II. LSA-II refers to a low-specific-activity type II material, which is characterized by having a low amount of radioactive material and nonuniform distribution of that material. It is also nondispersible and insoluble, meaning it does not disperse or dissolve easily.