According to your definition: Modesty means the quality or state of being unassuming or moderate in the estimation of one's ability.
And, Now we require to define it in our way, and in easy language.....So, We can say that !!

❍ Modesty - It is the quality of not being much proud or confident about ourselves or on our abilities. Let's see some examples to capture properly:
- She accepted the award with modesty.
- There was no false modesty in her victory speech.
- Because of her modesty, the young woman was uncomfortable wearing a bathing suit in public.
- Many religions emphasize modesty and being reserved in appearance.
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Yep, that's basically the whole task. To change the passage to become more 'upbeat', yet still share similar words to the previous words, the following could be changed to...
trudged= plodded
shuffled= staggered
scrutinised= questioned
sparse=meagre
closed in= confined
anxious= eager (Although eager and anxious generally do not share a similar definition, in this context they do as 'anxious' is used to describe being excited to do something, and share the same meaning of 'Very eager or concerned to do something or for something to happen'
pried= wrenched
confronted= suddenly exposed
puzzling=baffling
something=remarkable
used=castoff
questioned=pondered
anxious=uneasy
Answer: By practicing her speech, Laura's nerves calm down.
Explanation: Making a presentation is often a difficult thing for most people because the lack confidence presenting in front of a large audience. However with constant practicing one can over come the fear of public speaking. Also having positive thoughts boosts your advantage and confidence to speak to an audience.
I believe the answer is A. I don't know for sure.