What is a common concern regarding genetically modified crops?

Genetically modified (GM) crops present a concern regarding their potential to crossbreed with wild relatives or non-GM crops. This can occur when pollen from GM plants is transferred to wild species or nearby conventional crops, leading to the creation of hybrid plants. These hybrids might carry the genetically modified traits, which could impact local ecosystems, alter natural plant populations, and affect biodiversity.

Crossbreeding can also raise issues such as loss of genetic purity for organic and heirloom crops, and it can create new herbicide-resistant weed species. Such ecological consequences are a significant concern for farmers and environmentalists, emphasizing the importance of monitoring and managing the impacts of GM crops in agricultural systems.

The other options, while they touch upon relevant topics in the discussion of GM crops, do not encapsulate the primary concern associated with them. For instance, while food prices can be affected by various market factors, this is not directly attributed to the nature of the crops themselves. Similarly, accusations about human health implications are contested and widely debated, lacking conclusive evidence to establish harmful effects. Lastly, GM crops are often engineered for quicker growth cycles and greater resilience, which contradicts the statement regarding longer growth cycles. Thus, the potential for crossbreeding is the most pressing