Answer:
I will choose the light bulb of Thomas Edison because it has a great impact for the world industry. The world changed when Edison invented the first light bulb. He had failed for 6000 times but he success. His first bulb has shine for 40 hours and he didn't sleep to check how long can it shine.
Explanation:
I think the word you're looking for is "hypothesis".
For example, a hypothesis could be "dogs drink more often when owners are present".
And then this can be proven (or dis-proven) by an observation (or in this case rather: measurement).
Answer:
diathesis-stress model
Explanation:
According to the diathesis-stress model, mental disorders are caused by both a predisposition to mental illness and stress. As a consequence, the client's individual biological propensity to a psychological unbalance, combined with the stress of life experiences, can lead to mental illness, such as depression.
The conversion of farmable or habitable land to desert, as by a change in climate or destructive land use, is known as desertification.
