Which of the following are environmental factors mentioned as affecting plants?

• A. Light
• B. Gravity
• C. Stress
• D. Light, Gravity, and Stress

Answer: (D)

Plants respond to environmental cues that shape growth and development. Light drives photosynthesis and directs phototropic growth, helping shoots reach light. Gravity influences orientation through gravitropism, pulling roots downward and shoots upward. Environmental stress from factors like drought, extreme temperatures, or salinity triggers protective responses that alter physiology and development. Because the question asks which factors are mentioned as affecting plants, the set that includes light, gravity, and stress captures the described influences. Light alone, gravity alone, or stress alone are each factors, but together they reflect the full range of environmental effects on plants.