Final answer:
Plants that do not have green leaves may indicate a lack of chlorophyll and are unhealthy. Examples include succulents like aloe and cacti.
Step-by-step explanation:
The plant is unhealthy.
Plants that do not have green leaves may indicate a lack of chlorophyll, which is necessary for photosynthesis. Without photosynthesis, the plant cannot produce energy to sustain its growth and health.
Examples of plants without green leaves include succulents like aloe and cacti, which have adaptations to store water and survive in arid environments.