As developing nations industrialize and make use of capital resources, new challenges to the supply of the world's natural resources will no doubt appear because

the rate of depletion will increase as developing countries begin to use more natural resources.

Explanation:

Industrialisation leads to many destructive problems faced by the earth. As there is so much extraction of resources from earth.

This all happens in order to create a developed economy, which might create many useful products for human, but causes huge depletion of resources of earth.

More and more natural resources start getting scarce as with their increase in demand are extracted in huge amounts initially and many times wasted too.

But later on, this becomes a problem for concern, and human tries to develop alternatives.

answer; tech (a) is correct;