Your correct answer would be D.
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.
Answer:
strict security should give to protection area
Answer:
A & B
Explanation:
They used their new food to increase their population and then spread their knowledge to all of Africa. More food meant bigger populations, which led to cities.
The ecological effects of acid rain are most clearly seen in aquatic environments, such as streams, lakes, and marshes where it can be harmful to fish and other wildlife. As it flows through the soil, acidic rain water can leach aluminum from soil clay particles and then flow into streams and lakes answer is d