The Brainliest Answer!
No. The Lesson Natural Resources in Class 9 Science (SA-2) is also there, excluding the OTBA. There fore the lesson has to be learned. OTBA is different from the lessons. From Natural Resources chapter you can expect the following topics:
1. Air and water pollution
2. Biogeochemical cycles
3. Greenhouse effect and ozone layer depletion

All the best for your exams!! :)
2 4 2
oh sorry,for my question paper it ain't came.
OK but for your sa2
in ss ,did economics chap2 questions came only for otba
It didnot come for me !!!
It came for me