Answer:
China's trade increased.
Explanation:
Due to Zhang Qian's exploration of the West, the trade routes of China were greatly expanded.
Answer:
c. Observational studies have both independent and dependent variables.
d. Observational studies can be used to test hypothesis.
Explanation:
Observational studies are ones in which a researcher makes observations about his thoughts and views. He observes the risk and other effects before actual test takes place. This is usually the initial phase of research where observations are made for suitability of certain things that are to be researched. There is initial feasibility test conducted to identify whether the further research process is beneficial or not.
Answer: Hannah felt this way because her body couldn't differentiate between good stress and bad stress. Hannah had a wonderful wedding, but ended up tired due to the stress-response
Environmental Protection Agency target housing is described inside the toxic materials control Act as any housing built earlier than, besides housing for the aged or folks with disabilities or any zero-bed room dwelling.
Target housing is described in the toxic substances manipulate Act as any housing constructed earlier than 1978, except housing for the elderly or people with disabilities or any 0-bedroom dwelling.What triggers lead abatement
Lead abatement is designed to completely cast off lead-primarily based paint dangers and decrease or cast off the incidents of lead poisoning. This activity may be in the response to necessities by using country or neighborhood governments. Lead abatement projects are designed to completely remove current lead-based totally paint hazards. they'll be ordered through a state or nearby authorities in reaction to a lead-poisoned toddler or different cause, or may be undertaken voluntarily at any time.
Learn more about epa here:-brainly.com/question/13699599
#SPJ4
