Benefits of oil to the arabian peninsula

Oil is basically the only valuable natural resource many countries in the Arabian peninsula have. The income provided by oil sustains their economies and without it, they would be poor, underdeveloped nations. With oil as valuable as it is today, these nations are becoming richer than many European, Asian and American nations

Answer the collision of tectonic plates;

Well, a and b together would be negative. b alone would also be negative.