Search engines use indexes created by web crawlers to provide fast searches.
        
             
        
        
        
I think it'd be terminal concentrator.  A(n) terminal concentrator is a front - end processor that multiplexes the traffic from hundreds of remote terminals into one port on a large computer. 
        
             
        
        
        
Answer:
The answer is Letter D. Dumpster diving.
Explanation:
This process of going through a target's trash is known in the community as dumpster diving. This attack is a technique used to retrieve information that could be used to carry out an attack on a computer network. 
It is important to inform that the dumpster diving it is not limited to searching through  the trash for obvious treasures like acess codes or passwords written down on sticky notes.
 
        
             
        
        
        
Answer:
While the developed world benefits from the modern explosion of technology, countries like Ethiopia continue to rely on their forefathers' methods for important daily tasks such as farming, cooling, and providing clean water. These activities are often physically challenging, time and energy intensive, and are often carried out by female family members in many such societies. Furthermore, they can damage the local ecology and climate, such as deforestation and soil erosion caused by the use of trees for firewood. Western technologies are often too complicated, expensive, unacceptable, and difficult to maintain in developing societies, so they are of little or no use in these situations.