what geographical problems have been faced in the development of basic development infrastructures like nepal

Well in case of Nepal, the huge obstacle is, both figuratively and literally, the Himalayas. It is the biggest mountain range in the world and it obviously very hard to build some basic infrastructure, like roads.

answer; (i-o) psychologist

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.