Final answer:
Providing shelter with trees, sheds, or barns for horses is essential for their protection against elements and it is true that these measures offer adequate protection. Trees act as a windbreak and create warmer microclimates, while specially designed barns provide shade and shelter for livestock.
Step-by-step explanation:
It is true that as long as a horse is provided with shelter from wind and weather with trees, a shed, or barn, there is an adequate amount of protection. On cold, clear nights, horses will often sleep under the cover of large trees which can help them keep warm. The trees serve as a windbreak, reducing the cooling effect of the wind, and also trap some heat radiating from the ground, creating a microclimate that can be warmer than the open. Similarly, barns and sheds provide a controlled environment protecting horses from extreme weather conditions.
The architecture of barns, such as the Pennsylvania forebay barns, is designed with the wellbeing of the animals in mind. The forebay, or the overhang of the second floor over the ground floor, provides shade and perhaps some protection from the elements for the livestock. Structures like stone barns also contribute to the landscape, providing spaces for different animals within a farming operation.