Questions & Answers about A franquia é muito alta.
Here, a is the definite article meaning the. It matches franquia, which is a feminine singular noun.
So:
- a franquia = the deductible / the franchise / the allowance, depending on context
It is not the preposition a meaning to in this sentence.
É comes from ser, and está comes from estar.
In this sentence, é usually sounds more natural if you are describing the fee/deductible/allowance as a general characteristic:
- A franquia é muito alta. = it is high, as a general fact
If you said A franquia está muito alta, that would usually sound more like:
- it is high right now
- it has become high
- you are commenting on its current state
So both can be possible in some contexts, but é is the safer, more neutral choice here.