The study of animals is an important part of scientific ___. Scientists have been studying animals for a long time to learn more about them and to understand their behaviors. In the past, scientists would conduct ___ to observe animals in their natural habitats. However, with the development of technology, new ___ have been developed to study animals.

Nowadays, scientists use various methods to collect data about animals. One of the most common methods is to observe animals in the wild. By doing so, scientists can learn about the animals' natural behaviors and habits. In addition, scientists also use technology to study animals. For example, they use cameras and sensors to monitor animals' movements and activities.

The ___ of these studies have provided scientists with valuable ___ about animals. Through these studies, scientists have learned that animals have many ___ behaviors to humans. These similarities have led scientists to believe that animals may have some of the same cognitive abilities as humans.

Furthermore, the study of animals has also contributed to the development of medical ___ and treatments. Many diseases that affect humans can also affect animals. By studying animals, scientists have been able to develop new drugs and treatments that can be used to treat both humans and animals.

The study of animals is not only beneficial to science, but it is also important for the protection of wildlife. By learning more about animals, we can better understand their needs and how to protect them.

A. important
B. discovered
C. experiments
D. animals
E. scientists
F. results
G. research
H. knowledge
I. methods
J. similar
K. human
L. information

答案解析：

1.G. research：句意表示“动物的研究是科学研究的重要组成部分”，research意为“研究”，符合句意。
2.C. experiments：后文提到“科学家会在自然栖息地观察动物”，这里应该是提到过去科学家会做实验（experiments）来观察动物。
3.I. methods：随着技术的发展，科学家已经开发出新的方法来研究动物，methods意为“方法”，符合句意。
4.F. results：句意表示“这些研究的结果为科学家提供了有关动物的宝贵信息”，results意为“结果”，符合句意。
5.L. information：后文提到科学家通过这些研究学到了很多，所以这里指的是他们获得了关于动物的宝贵信息（information）。
6.J. similar：句意表示“通过这些研究，科学家发现动物有许多与人类相似的行为”，similar意为“相似的”，符合句意。
7.K. human：与前面的animals相对应，这里指的是“人类的”，即animals have many similar behaviors to humans（动物有许多与人类相似的行为）。
8.H. knowledge：句意表示“动物的研究不仅有利于科学，而且对野生动物的保护也很重要”，knowledge意为“知识”，符合句意。这里指的是通过研究动物，我们获得了更多关于它们的知识，从而可以更好地保护它们。