What are common plant reactions to sickness or injury caused by plant diseases?

The correct answer highlights the typical responses that plants exhibit when they experience stress from diseases or injuries. When a plant is affected by a disease, it can sometimes redirect its resources in response to the stress, which can lead to overdevelopment or abnormal growth patterns, such as hypertrophy, where tissues grow larger than normal. This reaction is often a result of the plant struggling to cope with the detrimental effects of the disease, which may result in the death of certain tissues as the plant prioritizes its resources.

In contrast, options that mention increased yield and flowering or faster growth and healthy coloration don't accurately reflect the typical response to distress caused by plant diseases. When a plant is suffering from illness, it generally cannot invest energy into producing more flowers or fruit, nor will it exhibit robust growth and vibrant colors. Similarly, while leaf drop and root decay can be responses to stress, they are more of a symptom rather than a universal reaction that encompasses the broader plant response to diseases. Overall, the focus on tissue development and death in the correct answer aligns with the observed physiological stress responses in plants dealing with disease.