1) ◎ Yes.
Animals have more developed senses than humans, such as sense of smell and hearing. that leads to their ability to detect weather.
2) ◎ Yes
air pressure is used to predict weather. Barometer is the instrument used to measure the pressure.
3) ◎ No
Wind and air are not same.
Air is the gaseous mixture in the atmosphere. But wind is the horizontal motion of air.