Birthright citizenship/adoption in Brazil

I am Canadian with multiple citizenships such as Colombia, St Lucia, Armenia, my husband is Armenian. We are planning to give birth in Brazil and possibly adopt in the near future so I am curious about a few things:

- If a child is born in Brazil, will the child automatically obtain citizenship by birth, no matter the nationality of the parents, even if they are non-residents? Are there any restrictions?
- Is Dual/Multiple Citizenship allowed? If yes, how can the child obtain it and when?
-Is it possible to lose birthright citizenship? If yes, how?
- Does one parent need to be a resident or both of the parents, for the child to obtain citizenship by birth?
- What kind of residency is required for the parents?
- Is one of the parents required to be a citizen?
- In this case, is the tourist visa acceptable? or perhaps they require a long term business visa?
- Do the parents need an official address in Brazil?
- If the child is born in Brazil, are the parents able to obtain citizenship through their child? If yes, what is the procedure? What are the general rules? Are there situations where the parents can lose this kind of citizenship if obtained in the first place?
-Do the parents have to stay for a period of time to obtain citizenship through their child?
-Are non-residents allowed to adopt Brazilian children, and is it possible to obtain citizenship through an adopted child?
-What are the options if the parents are denied citizenship through their born/adopted child?
-Are there any great adoption service providers?
-What are the best private hospitals that have maternity programs?

If you have any suggestions or advice, I would appreciate it

Thank you very much!