The carbohydrates produced in leaves cannot be translocated to different growing parts of the plant in the absence of:

✅ Explanation:
Plants produce carbohydrates i.e. their food and energy in green leaves by the process of photosynthesis which is transported by the phloem tissues to all parts of the plant but the main element which is essential for its translocation is Boron. Boron plays a vital role in plant metabolic activities.

📌 Other Options Explanations:
-Option A: Manganese: Manganese is essential for various plant functions, including photosynthesis, enzyme activation, and chlorophyll synthesis.
-Option C: Zinc: Zinc is important for plant growth and development, playing a role in protein synthesis, hormone production, and enzyme activity.
-Option D: Iron: Iron is crucial for chlorophyll formation and photosynthesis. Its deficiency leads to chlorosis (yellowing of leaves). While essential for plant health.