Correct the four pronoun-related errors in this paragraph. Fast-forwarding to modern times, the heyday of the human-powered flight is far from over. Lucrative prizes still abound for rotor-driven craft, whilst experimental versions of helicopters and ornithopters (flying machines with flapping, bird-like wings) are both on the drawing board and leaping off it with great abandon. The dream of human-powered flight has been an official reality now for more than 50 years, but the limits of their ingenuity are boundless– especially when inventors and engineers are spurred on by prizes as large as the $250,000 on offer from the American Helicopter Society’s Igor Sikorsky Prize Fund. And who knows, perhaps one day his commute to work will take place not on a bicycle but on a bicycle-powered craft. Does your office have a landing pad on the roof or a runway nearby? The day when she does might just be closer than they think!

YOUR, IT, YOU, I couldn't find the 4th one, Sorry ):

Explanation:

nobody can deny that cars are the most used means of transport all over the world. however owing a car could have some disadvantages. first of all, having a car on your own allows you to go everywhere without depending on timetables. moreover, you can use it whenever you need it no matter the time or the climate conditions. furthermore, if you have a car, you would not have to wait for nobody to share it when going to somewhere. nevertheless, one major disadvantages of owing a car is the fact that fuel is very expensive nowadays so that not everyone can afford it. in addition, you have to pay insurance to be protected by legal conditions. apart from this, the person who owns a car always has to maintain the car and repair any mechanical problem which could costs a huge amount of money. what is more, if you have to travel long distances, and you do not like driving, one probably would be exhausted and irritated due to driving for a long time. besides, cars cause environmental pollution. to sum up, owing a car means that you have more freedom to travel whenever and wherever people want to, however the car maintenance could be a very expensive issue that can have bad consequences at your economy.

answer: this is easy, i found "it"

i will repeat the question again, "find it."

here, i located it.