'An instrument which records earth's tremor'
The question asks to identify the instrument specifically designed for recording earth's tremors (vibrations or shaking of the ground).
We need a term for a device that measures and records ground motion, particularly that caused by earthquakes or other seismic events.
Based on the definitions, the correct term for an instrument that records earth's tremors is 'Seismograph'.
Morgenthau's principles of political realism are:
A. Politics is rooted in permanent and unchanging human nature which is basically self centred, self-regarding and self-interested
B. Politics is an autonomous sphere of action and cannot therefore be reduced to morals
C. International Politics is an arena of conflicting self-interests
D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:
Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?