The answer would be : D. Russian adaptation to extreme cold
If a steel is exposed to an extreme low temperature over prolonged period of time, the structural form of the steal could be damaged, which could lead to a destruction of a building's foundation. In order to prevent this, a country which extreme winter such as Russia developed a special steel that won't crack.
The route he took is the second option.
The blue dot in the picture that I included is the correct answer.
Hope this helped. Have a great day.~
Answer:
anxiety
Explanation:
Anxiety may be defined as a disorder of one's mental health which is characterized by the feelings of anxiety, worry, or fear which are so strong that it can interfere one's daily activities and behaviors.
Anxiety is our body's natural response to stress.
In the context, whenever Bill is in the aeroplane, he feels fear of flying and his nervous system automatically arouses because of the fear. This behavior is called as anxiety.
