Which Element is Considered a Macronutrient Needed by Plants

Question

Which element is considered a macronutrient needed by plants?  
A) Manganese
B) Iron
C) Copper
D) Potassium
E) Boron

Accepted Answer

Macronutrients are essential elements that plants need in large quantities, and Potassium is one of the primary macronutrients required by plants for healthy growth and development.