Answer:
scientist can tell by observing the seismic waves that are recorded all over the surface of the earth from distant earthquakes
Explanation:
Switzerland, Austria and France,Germany
<span>The correct answer to this question is B - the two key questions in geography are intended to obtain certain factual information. Whilst the other possible questions given as answers for this question, such as 'why are they going' give indefinite, opinion-based answers, only answer B. Which birds are migrating would give a definite answer.</span>
