Is this for the IELTS test ?
In some countries there are abudant resources for
Your need to come directly to point why rich nations should help poor nations. I think you went off topic. You mentioned about problems faced by poor countries, not the reasons.
You need to organise the essay.
Introduction - you have to write about what you are going to discuss in the essay and clearly state your opinion.There has been drastic changes in the living standard of people in richer countries. When it comes to sharing wealth with poor countries, my belief is that rich nations should help the poor countries by giving education and food to improve the standard of living. This essay will justify why richer nation should help the poor countries.
Body Paragraph 1 - reasons to justify your argument. Provide examples if needed.
Body Paragraph 2 - reasons to justify your argument
Conclusion - Summarise your essay. Restate your opinion.
Read some sample essays and follow the structure.
Hope this helps.