Re-write the paragraph while fixing the sentence fragments. Re-wording might also be necessary.
I often wonder. While looking out my window. How far do birds travel to land here? And sit in the tree by my house. And then, I think about the power it takes to fly an airplane. And see how small the birds are. They must be very well adapted to survive their yearly migrations. As they travel north and south with the changing seasons. If I was a bird. I might choose to stay in warmer climates all year. Instead of flying north. Where it is colder. That is definitely what I would do. If given a choice. I can only imagine the adventures my flying friends have experienced. Traveling much further than I have. Maybe than I ever will. Must finish my physics homework. So I can someday to learn fly. An airplane to these far off places.

I think a lot while looking out of my window. How far do birds fly to arrive at my house? The tree by my house and think about how much power it takes to fly an airplane? Then compare to how small birds are. They must be very well adapted to survive their yearly migrations.As they travel north and south with the changing seasons. If I was a bird. I would always go to a warmer place on the earth. Instead of flying north where it is so much colder. If I could choose I would travel with so far and go on so many flights with my friends. I would go so much farther than any one has ever gone before, but  I've got to finish my physics homework. Then I will be able someday fly. Oh what an airplane could do.

Explanation:

I rewrote sentences in different words.

the answer should be

the simple past tense of strive.

hope this !

c hydrophobia is the answer