Answer:
C. Looking for ways to obtain water from the ground
Explanation:
The environment shown in the attachment above is a dry area (arid or semi-arid area), as we can see the few vegetation in the environment are very scanty and dispersed.
Water resources in such environment is scarce and difficult to obtain. Thus, people who live in such environment would be very likely to use technology to solve the problem of getting water from the ground.
The most likely concern if the people in such environment would be: "C. Looking for ways to obtain water from the ground"