The fact that modern, sophisticated manufacturing innovations have enabled many firms to more easily customize their products and to offer them at dramatically reduced prices to satisfy the varying tastes of targeted customers represents the impact of the on the marketing of products.

The correct word that should fit in this gap is technology.

Explanation:

The preliminary information about "modern, sophisticated manufacturing innovations..." is a definition of the impact of technology. Thus, these equipments used by the firms had dramatically reduced the prices for the targeted customers. This is an impact of "the technology." The article "the" is used because the innovations had been mentioned in the previous part of the sentence.

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.