Question

trade blocs help countries by
limiting competition.
increasing barriers to trade.
improving product production.
allowing the pooling of resources.

Explanation:

Trade blocs are groups of countries that come together to promote trade among themselves. Limiting competition is not a positive aspect as healthy competition can drive innovation. Increasing barriers to trade goes against the purpose of trade blocs which aim to facilitate trade. Improving product production is a bit too narrow. The main advantage of trade blocs is that they allow countries to pool their resources. This can lead to economies of scale, better utilization of different countries' strengths (like one country having abundant natural resources and another having advanced technology), and overall more efficient production and distribution within the bloc.

Answer:

allowing the pooling of resources.