Answer: d). runoff from land
Step-by-step explanation:
Plastic is a non-biodegradable waste. The main reason for the largest accumulation of plastics in the marine garbage is the runoff from land. As plastic is the main utility material used for packing and covering articles.
The surface runoff may be due to water flowing over the surface of land . This water may come from rain or melting snow, river or lakes may take away plastics and may deposit them to the marine water resulting in pollution.