People including myself find the official on-line objection form very confusing - I fear almost deliberately so.
I hope the following helps.
Under Question 14, the relevants parts of the plan on which you might want to object are:
POLICY SS7 - covering the "strategic review" of the Green Belt round St Albans
POLICY LA2 - covering the eastward expansion of Hemel Hempstead towards Redbourn and St Albans
POLICY LA3 - covering the westward expansion of Hatfield towards Colney Heath and St Albans
You may want to object to one or all of these.
Answering Question 16, it is important that we all express our own opinions in our own words. But I hope we will all stress
- the disastrous damage to the individual character of St Albans and its district if they lose the rural surrounding
- the inability of the road and rail infrastructure to cope with the existing population
- the lack of local health facilities following the cancellation of the Hatfield duper-hospital and the likely downgrading of Hemel Hempstead and QE2 hospitals
- water supply issues when local rivers such as the Ver dry up with the water demand from the existing population