Solution:The given statement is true.
Concept: Transpiration is the process by which plants lose water in the form of water vapour through stomata present on leaves. It not only helps conduct water and minerals to the different parts of the plant but also cools the surface of the leaves.
Transpiration is a natural process by which a plant removes its excess water, creating a suction pull that helps translocation. But, if the rate of transpiration is increased, it could result in wilting of leaves, and if leaves dry, then the plant will die too. Thus, it is rightly described as a necessary evil.
Hence, the correct answer is option 1.