there are a lot of concerns that humans are facing each of them
Developing countries are confronted with a number of issues, notably famine and illiteracy.
They are not related to this topic.
developed countries should support poor ones in terms of food and education, while others believe that this support is responsibility of
wealthy poorer nations.
Also, you should include your own opinion in the introduction.
Firstly, governments should support their citizens with medical free service.
They are irrelevant to the topic. You should focus on food and education.
Most developed countries spend most part of their budget to improvement of education such as America, Japan and Great Britain.
In fact, this paragraph should explain why poor countries should be responsible for their own citizens. These developed countries are able to handle their responsibility well.
from wealthy nations
The comma is incorrect. Although is not followed by a comma.