Final answer:
In commercial agriculture, farmers grow crops mainly for sale in the market, not for their own family's consumption, unlike subsistence agriculture which is common in many parts of the world.
Step-by-step explanation:
In commercial agriculture, farmers produce crops principally for the market, rather than for personal consumption. This is in contrast to subsistence agriculture, where the primary aim is to feed the farmer's own family. Commercial farming entails specialization in certain crops, allowing for efficient production that can be sold in markets both locally and internationally. This type of agriculture is a key component of modernity, leading to economies where not everyone needs to farm, and instead, people can work in different sectors such as industry and services.
By comparison, while the majority of the world's population may engage in subsistence farming, such as in parts of Africa and Asia, commercial agriculture dominates in countries like the US, where only a small percentage of the population works in agriculture yet manages to produce an abundance of food for both the domestic and global markets.