Write 2 different small paragraphs with formal tone and informal tone

Two different small paragraphs with formal tone and informal tone:

Formal writing style is the one which describes every sentence in a very proper way. It does not makes use of contractions such as ‘it’s’, rather use ‘It is.’ When we use formal tone, there’s no space for first or third person (I,we) Example of formal tone is:

‘Over the past few years, education systems have come up with many new changes. Today’s education is no longer restricted within books. Rather, there are a wide number of applications, tutorials, and videos available online to expand and widen the knowledge of a child.’

Informal writing style is very casual. It is very much similar to how we have a conversation with our friends on a regular basis. Example if informal tone is:

‘Today, if we look around, we’ll notice that every person is engaged in some or the other social networking sites. We no longer interact with our friends and relatives face to face like we used to earlier. It’s you and me who needs to bring changes to change the present state.’

A paragraph with a formal tone (in the workplace):

I wanted to let you know that the shipment you ordered last week has been sent to the established location. I hope that you are satisfied with our performance, and that you continue to collaborate with us in the future. Thank you for your trust and we hope to hear from you soon.

A paragraph with an informal tone (for a friend):

Spain has been incredible! How I wish you were here. I know that we would have an awesome time drinking sangria and eating tapas. I can't wait to see you this summer and tell you all about my crazy adventures here. Make sure you keep note of all the juicy gossip back home. See you soon!

i think its d, but grammarly says none

explanation:

b

explanation: