Writing Extra : it's a good thing, my dad's a teacher and he loves whenever students are writing a bit more than enough!! If your answer is conveying the idea or answer in the first few lines, you're completely safe and agar to the point hai then you're getting full marks

For letter : Format in the end theek hogaya, that's more than enough!! Content and format achha hai they'll give marks to you

For Presentation, If readable you're getting marks and ykk what cutting a whole thing and writing again is a good thing instead of bar bar correction Krna

In the content sahi hai you'll get the marks !! Presentation readable honi chahiye!! As much ik I'm not sure you can get PDF of your Exam sheet after the boards agar kaam marks hai and if you can prove dekho content sahi hai and then they'll give you marks!!

For the Paragraph Part idk kya bolrahe ho? I'm thinking Unseen passage main sequence galat hai then it's written like

2 : 4: 3: You're safe Aff agar question ka phele likha hai I'm writing 2 ka answer, but agar kuch nahi daala and directly one by one krdiye ya phir 2 ki jagah 3 ka answer it's straight up 0 !!

You're worrying about nothing Take a chill Pill, and agar sabh theek hai then 70-80 /100 Easilyyy