Based on this phylogenetic tree, which species is most likely closely related to bos taurus?

The correct answer is Ovis aries.

Explanation:

In a phylogenic tree the closely related species are identified on the basis of most number of common ancestors. The species sharing the maximum number of the common ancestors are said to be closely related. They exhibit more genetic similarity as well as physical traits. In the given phylogenetic tree, Ovis aries and Bos taurus share a same ancestors as compared to others. Hence, they are most closely related.

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.