Which examples signify tissue underdevelopment caused by plant disease?

The correct choice highlights symptoms associated with tissue underdevelopment that are often linked to various plant diseases. Stunting refers to the reduced growth and small size of plant tissues, which can occur due to disruptions in cellular processes or nutrient uptake caused by pathogens. The lack of chlorophyll is indicative of poor health and can result from damage inflicted by diseases that affect the plant's ability to produce this vital pigment, essential for photosynthesis. Collectively, these symptoms suggest that the plant's tissues are not developing properly, leading to overall poor vitality.

In contrast, the other choices illustrate different plant responses. Curled leaves and bright coloration may signify nutrient deficiencies or pest infestations rather than an inability to develop tissue properly. Rapid growth and flowering generally indicate a healthy plant that is thriving rather than suffering from underdevelopment. Similarly, strong root systems and increased photosynthesis reflect robust plant health and vigor, which are contrary to the existence of tissue underdevelopment. These details clarify why the first choice most accurately represents symptoms associated with tissue underdevelopment due to plant disease.