Which of the following is NOT a research theme for ILRI?

The correct choice indicates that "Expansion" is not recognized as a research theme for ILRI (International Livestock Research Institute). ILRI focuses on themes that pertain directly to improving livestock production and the livelihoods of those who depend on livestock. The primary research themes such as Environment, Food, and Health reflect the institute's core objectives, which address issues such as sustainable agricultural practices, food security, and the health of animals and the ecosystems in which they live.

Specifically, the Environment theme addresses the impacts of livestock on the environment and seeks to develop sustainable practices. The Food theme is focused on nutrition, food security, and how livestock can improve food systems. The Health theme encompasses animal health, zoonotic diseases, and their implications for both livestock and human health.

In contrast, "Expansion" does not align with these focused themes, as it refers to a general growth or increase rather than specific research areas that ILRI actively engages with in its mission to promote sustainable livestock systems and improve livelihoods.