Answer:
Borehole instrument and seismic waves instruments.
Explanation:
Your answer is B.
Mark brainliest if I am correct.
Answer:
Explanation:
Often they are on a trade expedition. Caravans were used mainly in desert areas and throughout the Silk Road. Traveling in groups aided in defense against bandits, in the same way that convoys at sea helped protect against piracy. It also helped improve economies of scale in trade.
Here's photos of the essay. I can't submit it here.
I've made a mistake above. It's 'use them to buys things to your heart's content'.