Final answer:
The advantage of producing Bt crops is their increased resistance to pests (option a), which leads to safer pest control, reduces the use of harmful pesticides, and potentially improves crop yield and food nutritional qualities.
Step-by-step explanation:
The main advantage of producing transgenic organisms such as Bt crops is a) Increased resistance to pests. These crops are genetically modified to express the Bacillus thuringiensis toxin, which is toxic to many insects. This biotechnological innovation not only helps in improved pest control but also reduces the reliance on chemical pesticides, thus contributing to safer environmental practices. Moreover, transgenic plants can also be engineered for other beneficial traits such as drought resistance, improved nutritional value, and herbicide resistance to make production more manageable and cost-effective.
For instance, besides increased resistance of crops to environmental stresses, these crops may also help in achieving improved yield from crops, sometimes by enabling them to grow in conditions where non-transgenic varieties would fail. The advancements in biotechnology have made it possible to enhance the nutritional qualities of food crops, offering potentially greater health benefits to consumers.