Question

What is the difference between thorns and spines?

Answer 1

spines-- are sharp pointed structure which are modified leaves they give protection to the plans for herbivorous
throns-- are Woody a straight are pointed structure they give protection and help in climbing throne are found in many plants such as citrus and Duranta

Answer 2

Spines are sharp, pointed structures which are modified leaves.
Thorns are woody, straight and pointed structures.