Which product category is primarily served by BASF's Construction Chemicals division?

The correct answer focuses on the Construction Chemicals division of BASF, which deals primarily with products that enhance the performance and durability of building materials, including concrete. This division offers a range of solutions such as concrete admixtures, which are chemical additives designed to improve the properties of concrete, making it stronger, more workable, and more resistant to various environmental conditions.

Building materials are an essential part of construction, and BASF's expertise in this area allows them to provide innovative products that significantly contribute to the efficiency and sustainability of construction processes. By specializing in concrete admixtures and related products, BASF supports construction projects in achieving desired structural qualities and performance standards.

In contrast, the other options represent different product categories that do not align with the focus of the Construction Chemicals division. For instance, animal feed and nutrition pertain to agricultural products, while pesticides and herbicides are related to crop protection in farming. Similarly, personal care products involve formulations designed for use on skin and hair, which falls outside the realm of construction. Therefore, the primary focus of BASF's Construction Chemicals division is best captured by the category of building materials and concrete admixtures.