yes
Yes, Venezuela allows dual citizenship.
A birth certificate shows citizenship.
It is called "birthright" when one acquires citizenship based on their place of birth.
The three types of citizenships are: Citizenship by birth Citizenship by descent Citizenship by naturalization
The same thing as in any Christian Church it celebrates the birth of Jesus.
No, Algerian birth certificates for example are in no way related to US citizenship.
by birth and by law
This question is meaningless, it is missing punctuation. But the answer of the question "Would having only a birth certificate be absolute proof of citizenship, in the US, if your father was not a citizen and your mother did not meet the requirements for citizenship?" would be no. For example, Czech birth certificates have nothing to do with US citizenship.
NoSee US Citizenship and Moving Abroad.http://www.richw.org/dualcit/faq.html
by birth and by law
By birth or by a test to be a citizen.
It is a certificate that acts as certificate of citizenship for children whose parents live abroad. You have to go the embassy of your country of citizenship, register your child's birth who was born abroad and get that certificate in order for him/her to gain your citizenship officially.