Answer:
technical skills
Explanation:
Based on the information provided within the question it can be said that in this scenario Harry spends time on his technical skills. This refers to the individuals's ability or knowledge needed in order to perform specific tasks. These types of skills are usually needed in areas such as mechanics, information technology, etc. Where having one skill allows you to perform one task.
Serotonin which is an abnormal chemical activity in the body's endocrine system.
The irregular coastline has many natural harbors.
Answer:
Either as a false alarm or, a signal detection theory
Explanation: