Answer:
what line?
Step-by-step explanation:
The brain is about 1500kg when your about the age of fifteen

<u>Answer</u><u>:</u>
<u>a.</u><u> </u><u>7</u>
Hope you could understand.
If you have any query, feel free to ask.
1- Formal
2- Something familiar, and something he has strong feelings about.
3- a question
4- Brainstorming
Hope this helps! : )