Answer:
Warning signs that indicate approaching hazards are usually yellow with black lettering or symbols. Warning signs in work zones are orange with black lettering or symbols.
 
        
             
        
        
        
Since the early 1900's, the industrial use of water has INCREASED DRAMATICALLY.
        
             
        
        
        
The correct answer is letter D
Sensory Adaptation is the reduction of our sensitivity to stimuli that do not change. Adaptation occurs after constant exposure to a stimulus, our nerve cells start firing less frequently.
Sensory adaptation is a decrease in attention to a stimulus that is not the object of conscious control.
 
        
                    
             
        
        
        
Hello there
the answer is 
It seems to me that those cultures which have an oral rather than a written tradition have rather sophisticated ways of memorising certain things. Many of them are strongly attached to land which is the basis of not only their livelihood, but also their spiritual beliefs.
Basically, from my limited understanding, the land then acts as a “map” for many things, from the surrounding geography through to a “map” of their spiritual beliefs. As land has lots of identifying markers, this then acts as an aid to remembering most details of the lives of people from such cultural traditions.
 
        
                    
             
        
        
        
Anthropological survey of such rituals gives a peek into societies with no surviving written history. 
Explanation:
Modern native cultures are the ones that have survived a rigorous process of termination and getting westernized. 
To safeguard them, the anthropologists need to document their rituals and decode their dances for possible symbols and way of life as it developed in the place when there was no issue of the extinction
It is only through the dances and rituals of these people can we get a peek into what their core values are and how their history has been in the absence of any written records.