I would think the answer is C. their advancements in farming and high tech equipment
Hope this helps
Answer:
Obsessive compulsive.
Explanation:
Obsessive-compulsive disorder (OCD) is a mental illness that causes repeated unwanted thoughts or sensations (obsessions) or the urge to do something over and over again (compulsions). Some people can have both obsessions and compulsions.
OCD isn’t about habits like biting your nails or thinking negative thoughts. An obsessive thought might be that certain numbers or colors are “good” or “bad.” A compulsive habit might be to wash your hands seven times after touching something that could be dirty. Although you may not want to think or do these things, you feel powerless to stop.
They avoid being detected because this would throw off the behavior patterns that exist naturally and they don't want their presence being known since this might throw it off.<span />
Explanation:
As nouns the difference between tenant and villein
is that tenant is one who pays a fee (rent) in return for the use of land, buildings, or other property owned by others while villein is (historical) a feudal tenant.
As a verb tenant
is to hold as, or be, a tenant.
