Final answer:
Option (b), A significant proportion of the world's fish harvest is used for human consumption, serving as an important source of animal protein for a vast part of the global population.
Step-by-step explanation:
A significant proportion of the world's fish harvest is used for b) Human consumption. Global fish production has a significant role in the human diet, especially as a source of animal protein. A considerable percentage of the population relies on fish as the main source of animal protein.
According to reports, about one billion people depend on aquatic resources for their primary source of animal protein. With the industrial and artisanal fishing industries generating considerable annual catches, fish constitutes more than 2.8 billion people's 20% or more of their average per capita intake of animal protein.
However, the sustainability of global fisheries has been called into question, with reports suggesting that a decline in production and few fisheries being managed sustainably. With fisheries being essential for both economic livelihoods and food security, their importance in the global food system cannot be overstated.