There are many human relations skills which can help you to more willingly take on a challenging subject. Greater self-confidence is one of those for example.
Being more self-confident enables you to trust more in yourself and therefore to also think you can succeed better with more challenging topics in comparion to the scenario where you don't really think highly about yourself.
From 1918-1919 it is the deadliest in modern history it infected 500 million people world wide about 1/3 of the population at the time and killed 20 million to 50 million people
Answer:
involuntary muscles, breathing, heartbeat, sweating, digestion
Explanation:
they all happen subconsciously
