I am guessing that you are wanting me to fix this sentence, but if you want more help I will need more information.
I would make this sentence better by changing the word 'tinkered' to repaired. It is a more professional word and implies that Nelson actually knows what he is doing.
Hope this helped! If you need anymore help just let me know! :)
Answer:
D) Similarly
Explanation:
It is another example of an animal teaching their young how to survive.
The medium of the story is No.C