Global citation
1-crisis: a stage in a sequence of events at which the trend of all future events, especially for better or for worse, is determined; turning point. https://www.dictionary.com/browse/crisis
2-citation:a word or piece of writing taken from a written work. Caulfield, J. (2022, June 16). How to cite A dictionary in APA style. Scribbr. Retrieved April 11, 2023, from https://www.scribbr.com/apa-examples/dictionary/ 
3-Scarcity: the quality or state of being scarce
especially : want of provisions for the support of life. Caulfield, J. (2022, June 16). How to cite A dictionary in APA style. Scribbr. Retrieved April 11, 2023, from https://www.scribbr.com/apa-examples/dictionary/ 
4-Shortage: A shortage is a lack of something, especially a severe lack. Caulfield, J. (2022, June 16). How to cite A dictionary in APA style. Scribbr. Retrieved April 11, 2023, from https://www.scribbr.com/apa-examples/dictionary/