I. One of the lessons learned from the ongoing COVID-19

Solution

I- The word ‘collected’ is wrong. The correct word is the adjective ‘collective’, which means ‘of or shared by every member of a group of people’. One of the lessons learned from the ongoing COVID-19 pandemic is the need for collective action among members of the international community to effectively address global challenges such as pandemics and climate change II is correct. III- The word ‘worked’ is to be replaced with the word ‘work’, which is grammatically correct here. As part of the Middle East Green initiative, Saudi Arabia will work with the Gulf Cooperation Council countries and regional partners to plant an additional 40 billion trees in the West Asian region. IV- The noun ‘unity’ is incorrect here. The correct word is the verb ‘unify’. Saudi Arabia hopes that the launch of the Saudi Green Initiative and the Middle East Green Initiative marks the beginning of a green era and that these initiatives provide momentum to other countries to unify their efforts to save our planet.