Paragraph Eight There is generally a certain proportion between a living creature's length of life and the time it takes to grow to full size. There also exists some relationship between the growing body and the growing brain. The animals with more complicated bodies and brains develop more slowly, and are dependent longer upon their mothers than do creatures with simpler systems. The c______of the growth of animals.
【正确答案】：character
【题目解析】：该段描述了动物成长的特点，空白处缺少的是“特点”一词，character符合题意。
