How do microplastics form and what are their ecological risks?

How do microplastics form and what are their ecological risks?

• A. Fragmentation of larger plastics into microplastics; ingestion by marine organisms, entry into food webs, potential toxins.
• B. Direct formation of microplastics by sunlight without fragmentation.
• C. Microplastics are produced by microbial synthesis.
• D. Microplastics are never ecologically significant.

Answer: (A)