Hi,
The LDS church is a strong advocate for families with 2 parents. The church believes in marriage and strong family ties between the man and the woman. They beleive that children need a father and mother figure in their lives as parents and that parents need each other just as much as they need kids. Now, that does not mean that the LDS church beleives that single parents are bad, it just prefers for the family to have a mother and a father. There are many single parents in the church and in the world that are excellent parents who are having to fill both rolls. The church supports these people and has many programs in place to help them and offer resources. The church is just an advocate of forever families, with a Mommy and a Daddy.
I think that children need to have different perspectives available to them in parents so that they can see how they work together and resolve differences. However, I know that all marriages do not have that and that in many cases, the children are better off with one good parent than a good one and a bad one. I agree with the church, I believe that all children would be better off with two good parents, a male and a female, who love each other and their children. I realize that is rare in society today, but it would be nice.
I hope that answers some of your question, it is a little hard to put into words. Feel free to ask any other questions, this forum is very helpful and we will try to answer your questions!
Happy New Year!
LBL