Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
" it can be used to argue that any complex dimension 2 torus cannot embed in CP4" That is not correct. There are abelian surfaces embedded in P^4, namely the zero-loci of sections of the Horrocks-Mumford bundle. It is true that a complete intersection in P^N cannot be a complex torus.
For sure one can construct examples of pairs $(X,m)$ for which the answer to your yes, but there are also examples where $Y_m$ does not contain any rational curves. What kind of answer are you looking for?
If I understand the terminology correctly, no. There are examples of 2-dimensional compact complex manifolds $X$ which contain no compact analytic subvarieties of dimension 1. For such an $X$, take $A$ to be any point in $X$.