Answer:
World War One, the French Revolution is the most important period in modern European history.
Explanation:
The Revolution birthed the modern nation state. It ended the last vestiges of feudalism in Western and Central Europe. It spread Enlightenment ideas across Europe.
# Breathing rate:it decreases breathing rate.
# The effects of tobacco smoke on the respiratory system include:
irritation of the trachea (windpipe) and larynx (voice box)
reduced lung function and breathlessness due to swelling and narrowing of the lung airways and excess mucus in the lung passages
impairment of the lungs’ clearance system, leading to the build-up of poisonous substances, which results in lung irritation and damage
increased risk of lung infection and symptoms such as coughing and wheezing
permanent damage to the air sacs of the lungs.
.#Heart rate.
See the image for decrease in heart rate..
2.Athelets and musician has high capacity to hold air. .
See image for answer...
C. The prices of crops increased, which caused farmers to overuse their lands and ruin the topsoil.
Remember the Dust bowl was happening at the same time
The most important factor that began the Renaissance was the spread of classical works and knowledge, which inspired changes in established values and ways of thinking. This information primarily spread through Europe as a result of the fall of the Byzantine Empire and the sacking of Moorish Spain.
Here is a great link
https://www.enotes.com/homework-help/what-started-renaissance-167279