Question

i) The international summit focused on climate change and the urgent need of nations to reduce emissions. ii) A series of natural disasters have disrupted global supply chains, affecting product availability worldwide. iii) Many students expressed concerns about tuition fees and demanded that universities should reduce costs.

Q: Answer-i) The international summit focused on climate change and the urgent need of nations to reduce emiss...

Sentence i is incorrect due to the phrase urgent need of nations. It should read urgent need for nations to be grammatically correct. Sentence iii is incorrect due to redundancy. The phrase demanded that universities should reduce costs should instead be demanded that universities reduce costs. Sentence ii is correct in all forms.