I think it is <span> Biorobotics and robotics military applications. </span>
An operational definition, when applied to data collection, is a clear,
concise detailed definition of a measure. The need for operational
definitions is fundamental when collecting all types of data. It is
particularly important when a decision is being made about whether
something is correct or incorrect, or when a visual check is being made
where there is room for confusion.
I believe the answer is: Social needs
Social needs refers to a form of necessities that could only be fulfilled with the help of other individuals. Social needs tend to affect our psychological health rather than our physical health, but if it is left unfulfilled for a long period of time, it could definitely lead to self destructive behaviour that harmful to our physical health.
Answer:
The Chinese had to open five ports to foreign trade
