They thought that it might keep them safe from harm.
Answer:

=> D. Malaria affecting the ecosystem
geology, oceanography, meteorology, astronomy
these are the main disciplines that are involved in earth sciences
The correct answer is (4)
Halite is the natural form of salt commonly referred to as rock salt. It is a common and well known mineral and is found in solid masses, and as dissolved solution in the oceans and in salt lakes.
The inland lakes that are rich in salt exist in arid regions, and may also be below sea level without an outlet. These lakes evaporate during dry seasons, causing a recession in the water level and an icrease in salinity content.
When this happens, salt forms on the evaporated shores of the lake.
Answer:
3 basic economic questions and answers
In a society, the economic system answers three fundamental questions:
What do we produce?
How do we produce it?
For whom do we produce it?
Explanation: