The RS coursework site has relevant tips for a coursework question on Abortion - why not start there? Also look at this site's short-course pages.
ProChoice web pages
ProLife web pages
You will consider a range of Christian responses, with many Christians arguing that the woman shouldn't always have the right to choose, but that IN SOME CASES abortion may be the lesser of two evils. Be very careful to think about what you will be saying in (c) - it is easy to overlap. You may prefer to include church teaching here rather than in a.
Remember - some of these sites aren't Christian, but some Christians may agree with their reasoning. Also, this question is NOT just about whether abortion is 'right or wrong' (unlike c.). When abortion first became legal in the UK, it was merely to prevent back-street abortions. Christians arguing for abortion to be legal were arguing that, if it's going to happen anyway, it should be safe. The question also covers how to respond to those who have had abortions. So Christians may 'respond to' abortion in many ways.
You should refer to specific churches where possible. For example:
You would need to put forward and defend those who are ALWAYS against abortion. You will then need to look at difficult cases (for example when the mother's life is threatened, rape, incest etc.). You are skirting around the same points as above - try to say something new and use different examples where possible. Also try to look for a new angle on these issues. Make sure your opinion comes across clearly too.
General links: