Why did olympe de gouges write the declaration of rights of woman and citizen ? what was the effect of it on her ?

https://www.britannica.com/topic/Declaration-of-the-Rights-of-Woman-and-of-the-Female-Citizen

Look here, it should give a answer. Hopefully...

As mass production lowered the prices of goods, many more consumers bought them, which increased demand.

Explanation:

As supplies increased due to mass production during the Industrial Revolution, business owners were apply to charge less for each item, which caused more people to buy the items. That increased demand for the item, which allowed manufacturers to raise its price again, resulting in higher profit (since workers' wages remained the same).