Leaves and Photosynthesis.

Mango tree:
Based on https://en.wikipedia.org/wiki/Mango ,mango are juicy stone fruit (drupe) from numerous species of tropical trees belonging to the flowering plant genus Mangifera.Mango trees grow to 35–40 m (115–131 ft) tall, with a crown radius of10 m (33 ft). Mango trees have simple alternate lanceolate leaves that are12 to 16 inches in length and yellow-green, purple, or copper in color when young. mango trees leaves use a process called photosynthesis to make food, the leaf also use the energy of the sun to change water and carbon dioxide into a sugar called glucose.It depends on the tree's s age, but a mature, healthy mango tree can have 200,000 leaves.

Coconut tree:
Depend on https://en.wikipedia.org/wiki/Coconut,The coconut tree (Cocos nucifera) is a member of the family Arecaceae (palm family) and the only species of the genus Cocos.The term coconut can refer to the whole coconut palm or the seed, or the fruit, which, botanically, is a drupe, not a nut. coconut trees hight can grow to the height of 98 feet and has 13 to 20 inches long pinnate leaves.coconut trees leaf convert sun's energy into sugars through a process called photosynthesis, to help itself to make food.