A kangaroo can reach the highest but maybe its a giraffe...i don't know.
Culminate means to reach the highest point or final stage of something. It can also refer to a culmination, or the highest point of achievement or development.
Giraffe
when did the american detective mysteries reach it's high point
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India
If you mean why is a giraffe's neck important to its survival, the answer is that it's needed to reach the leaves that a giraffe eats.
Africa
CULMINATING* To reach the highest point or degree.* To come to completion.
One of the advantages, is they can reach and then eat the highest leaves off the tallest of trees, they can overpower the small animals when fighting them, and so on and so on.
Giraffe
The highest point on a fir tree is typically the tip of the central leader, which is the main vertical stem at the top of the tree. This central leader is responsible for the tree's vertical growth and can reach the highest point on the fir tree.