Question: What are the definitions of quarantine, isolation and physical distancing?

Answer passage (source: WHO):
page_title: Q&A on coronaviruses (COVID-19)
section_headers: How can we protect others and ourselves if we don't know who is infected?
section_content: Practicing hand and respiratory hygiene is important at ALL times and is the
best way to protect others and yourself ~~.~~
When possible maintain at least a 1 meter distance between yourself and
others. This is especially important if you are standing by someone who is
coughing or sneezing. Since some infected persons may not yet be exhibiting
symptoms or their symptoms may be mild, maintaining a physical distance with
everyone is a good idea if you are in an area where COVID-19 is circulating.

Reviewer feedback on this answer:
This answer is irrelevant to the question. The answer does not provide any information and definitions of quarantine, isolation and physical distancing. It contains information on hand and respiratory hygiene as well as physical distancing.
This passage is about hand washing.  None of the terms in the question are defined.

Reviewer ratings:
Bad
Bad

Answer passage (source: WHO):
page_title: Q&A on coronaviruses (COVID-19)
section_headers: What is the difference between self-isolation, self-quarantine and distancing?
section_content: Quarantine means restricting activities or separating people who are not ill
themselves but may have been exposed to COVID-19. The goal is to prevent
spread of the disease at the time when people just develop symptoms..
Isolation means separating people who are ill with symptoms of COVID-19 and
may be infectious to prevent the spread of the disease.
Physical distancing means being physically apart. WHO recommends keeping at
least 1 ~~-~~ metre distance from others. This is a general measure that
everyone should take even if they are well with no known exposure to COVID-19.

Reviewer feedback on this answer:
All three of the terms are defined in this passage.  This seems like a great answer.
This answers the question directly. The answer provides definitions of quarantine, isolation and physical distancing as asked in the question.

Reviewer ratings:
Excellent
Excellent

Answer passage (source: WHO):
page_title: Q&A on coronaviruses (COVID-19)
section_headers: What does it mean to self-isolate?
section_content: Self-isolation is an important measure taken by those who have COVID-19
symptoms to avoid infecting others in the community, including family members.
Self-isolation is when a person who is experiencing fever, cough or other
COVID-19 symptoms stays at home and does not go to work, school or public
places. This can be voluntarily or based on his/her health care provider’s
recommendation. However, if you live in an area with malaria or dengue fever
it is important that you do not ignore symptoms of fever. Seek medical help.
When you attend the health facility wear a mask if possible, keep at least 1
metre distant from other people and do not touch surfaces with your hands. If
it is a child who is sick help the child stick to this advice.
If you do not live in an area with malaria or dengue fever please do the
following:
- If a person is in self-isolation, it is because he/she is ill but not
severely ill (requiring medical attention)

have a large, well-ventilated with hand-hygiene and toilet facilities 
If this is not possible, place beds at least 1 metre apart 
Keep at least 1 metre from others, even from your family members 
Monitor your symptoms daily 
Isolate for 14 days, even if you feel healthy 
If you develop difficulty breathing, contact your healthcare provider immediately – call them first if possible
Stay positive and energized by keeping in touch with loved ones by phone or online, and by exercising yourself at home. 


Reviewer feedback on this answer:
The only term that is addressed here is isolation.  I think it would be a good answer if the other answers were described.
This information does not answer the question. The question is asking about the definitions of quarantine, isolation and physical distancing, however, the answer provides a comprehensive information on self-isolation.

Reviewer ratings:
Could be Improved
Bad