Question

What is so special about the leaves that they can synthesis food but other parts of plant cannot

Answer 1

The structure of leaf is designed in such a way that food can be prepared , while the other parts lack with it . A leaf can turn food into energy .
Chlorophyll is the molecule in the structure of the leaves that takes the energy in sunlight to turn water and carbon dioxide gas into sugar and oxygen gas.
Leave have chlorophyll while the other lacks .
Leaves are made out of several layers that are in between two layers of super tough skin cells called epidermis. The epidermis is also known to secrete cuticle, which is a waxy substance. All of these layers protect the leaf from pests such as insects and bacteria. There are also stomata cells that are pores where gases can enter and exit through the leaf.
Most of the food production in the leaf actually takes place in the elongated cells that are known as palisade mesophyll inside the leaf. The leaf also has veins that can help to support the leaf by transporting food, water and minerals to the leaf and to the plant.
Leaf has so many such things that other plants do not . So by this you can say the speciality of leaves over other parts of plants .

Answer 2

Answer:

Leaves have a special green coloured pigment which is known as chlorophyll which helps it to capture the energy of the sun . The other parts of a plant cannot capture this energy because this pigment is absent in them.