When iI wereas a child, iI wanted to become a scientist .

"I" always has to be capitalized!

Bbecause iI was fascinated ofwith the idea of becoming an explorer of the world.

This really isn't a complete sentence, so you have to combine it with the first sentence to create a complete sentence :D


The complete sentence would look like this:
"When I was a child, I wanted to become a scientist because I was fascinated with the idea of becoming an explorer of the world."

Why iwould I love that?

AsBecause knowledge is thea powerful tool that can help improve people's lifeves.

When you answer a "why" question, you would use the word "because" instead of "as".
Also, the word "people" is plural, so "life" has to be plural too. The plural of "life" is "lives".

However, the question and the answer sound kind of awkward. I would combine these two ideas into a full sentence like this:

"I would love being an explorer because knowledge is a powerful tool that can help improve people's lives."

But when iI was in high school, iI realized that my country's academic infrastructure could not support a good career( (in other words, iI am not rich enough to support myself toin pursuitng a career in science career).

So i, I decided, that if iI could not become thean explorer of the world, then at least iI could become thea builder of it.

Here you have to write "an explorer"/"a builder" because you wouldn't be the only explorer/you aren't the only builder in the world.

So i, I am an engineer now.