Correct option is D
Explanation-
Fall armyworm
Scientific name: Spodoptera frugiperda
It is a larval stage of a moth, highly invasive and destructive. It mainly affects maize (corn) but also damages sorghum, rice, sugarcane, and other crops. It is native to the Americas, it has spread to Africa and Asia, including India.
The fall armyworm is an insect in the Order Lepidoptera. This order includes moths and butterflies. The larval (caterpillar) stage is the damaging phase.
Incorrect Options-
Option a : Hemiptera
Includes bugs like aphids, cicadas, and leafhoppers. They are sucking insects, not caterpillar-like. Fall armyworm does not belong here.
Option b : Homoptera
An old classification; now part of Hemiptera. It includes plant sap-sucking pests (e.g., whiteflies, aphids). Again, not related to moth larvae.
Option c : Diptera
It includes flies and mosquitoes. They undergo complete metamorphosis, but do not produce caterpillars. Fall armyworm is not a fly.
Final Answer: Option d – Lepidoptera
