Concept:Disease resistance in crop improvement focuses on developing plants that can survive and yield well even when diseases are present.
Explanation:Disease resistance means that the crop can resist or tolerate infections caused by pathogens like fungi, bacteria, and viruses.
This ability helps the crop withstand attacks from these harmful organisms.
As a result, crop losses are reduced, and the yield becomes more stable and reliable.
Thus, the main aim of breeding for disease resistance is to protect crops from pathogen damage.
Answer:A. enables crops withstand attack by pathogens