$(a)$ Distinguish between macronutrients and micronutrients on the basis of $(i)$ their functions and $(ii)$ amount required by plants. $(b)$ Classify the following elements as macro or micronutrients in plants: $(i)$ Nitrogen,$(ii)$ Zinc,$(iii)$ Copper,$(iv)$ Potassium. $(c)$ In what way is the deficiency of these nutrients harmful to crops?

(N/A)

Parameters	Macronutrients	Micronutrients
$(i)$ Functions	These nutrients help in building the plant body and promote growth.	These nutrients are required for various enzymatic activities in plants.
$(ii)$ Amount required	Required in comparatively large quantities.	Required in very small quantities (traces).

$(b)$ Classification:
$(i)$ Nitrogen: Macronutrient
$(ii)$ Zinc: Micronutrient
$(iii)$ Copper: Micronutrient
$(iv)$ Potassium: Macronutrient
$(c)$ Deficiency of these nutrients is harmful because it negatively affects physiological processes in plants,including reproduction,growth,and overall development,while also increasing susceptibility to diseases.