Answer: Your husband is working hard to pay bills; he's probably just too tired to do anything else.
Explanation: Working can become very stressful and can sometimes be very overwhelming for an individual. Stress creates exhaustion and that oftentimes can lead to becoming mentally and physically drained.
B. Sails
The Egyptians were among the first to use sails on their ships to improve transportation.
Answer:
Is that internal validity refers to the structure of a study and it's variables while external validity relates to how universal the results are.
Explanation:
Answer: the history is prepared by the study and exploration of various sources such sources are greatly valuable and they must be preserved.
