The correct answer is was working.
You need to use past continuous tense (was working) to denote that an action which was being processed for a period of time has now been interrupted. So, Penelope was working on her homework for a prolonged period of time, and then the doorbell rang and interrupted her.
D. When traffic signals are timed traffic seems to be less dense.
Syria and Iraq are affected by turkey building their dams
Answer:
Occurs in a real-world setting.
Explanation:
When a researcher questions something that requires observation of an animal in the real world it is important that nothing happens that may change the behavior of the animal that is being observed. This affects the quality of the research as it is influenced by outside factors.
Here, Dr. Sanjay is observing how often strangers approach one another at the park on weekend afternoons. People are interacting the way they would if he was not present. This makes the observation in the real-world setting valid.
Cyclothymia <span>refers to alternating periods of hypomania and depression.</span>
