निम्नलिखित में से कौन सा युग्म भाषा अधिगम के उत्पादक कौशल (Productive Skills) का प्रतिनिधित्व करता है?

The development of reading and writing skills:

'Listening and speaking are primary skills, while reading and writing are secondary skills.' This statement refers to which principle?

Asking a student to read a poem primarily aims to test which skill?