What type of seed could potentially harm crops by competing for resources?

Noxious weed seeds are recognized for their potential to cause significant harm to crops by competing for vital resources such as nutrients, water, and sunlight. These invasive plants can outcompete cultivated crops, reduce yields, and disrupt agricultural ecosystems. The presence of noxious weeds in a field can lead to a decline in crop health and overall productivity, making them a serious concern for farmers and agricultural professionals.

In contrast, the other types of seeds mentioned—agricultural seed, bulk seed, and vegetable seed—are not inherently harmful to crops in the same way. Agricultural seeds and vegetable seeds are cultivated for their productive use in farming, while bulk seeds may refer to a quantity of seeds sold in a non-packaged form. None of these alternatives are classified as harmful to crops through competition, as they are intended for beneficial agricultural practices rather than causing disruption through aggressive growth like noxious weeds do.