Gerald was playing in the woods. He used nuts and sticks to create four nice animals.
杰拉尔德在树林里玩耍。他用坚果和树枝做成了四只漂亮的动物。
His sister managed to bend the animals around without removing any of the sticks.
他姐姐设法把那些动物绕过来摆好，一根棍子也没拿掉。
Gerald was very upset because he really loved the figure of a dog.
杰拉尔德非常难过，因为他真的很喜欢那尊狗的雕像。
Question: 问题:
Which of the following figures can be bent back to make the figure of the dog again? Click on the figure you select.以下哪个图形可以折回去再次变成狗的形状？点击你选择的图形。
A.
B.
C.
D.
Explanation 解释
Each animal is determined by the connections between its parts. The specific positions of parts and angles of connections may change during the dance, but that does not change the animal itself. So we need to determine pairs of pictures with the same structure on them.
每种动物都由其各部分之间的连接关系所决定。在舞蹈过程中，各部分的具体位置和连接角度可能会发生变化，但这并不会改变动物本身。所以我们需要找出结构相同的成对图片。
Let's start with the starfish. It has a regular structure and is therefore easiest to spot: one central part and five arms. There is only one possibility among transformed animals:
我们先从海星说起。它结构规整，因而最容易辨认：一个中心部分和五条臂。在变形动物中只有一种可能：
The giraffe is quite like a starfish, except for that one arm is longer, it is the neck with the head. So we search for an animal with four short legs, one longer neck, all attached to one part, the body.
长颈鹿很像海星，只不过其中一条“臂”更长，那就是脖子和头。所以我们寻找一种动物，它有四条短腿，一条长脖子，都连在一个部位，即身体上。
The sea lion is also similar, but one of the short pieces is missing, so the central part only has four connections.
海狮也是类似的，但其中一段短的缺失了，所以中间部分只有四个连接点。
Last remaining is the dog. It has seven parts and none of them is clearly central.
最后剩下的是狗。它有七个部分，但没有一个部分是明显的中心。
