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Most kangaroos have large, heavy tails, while spider monkeys have long, thin tails.
Kangaroo tails are useful when the kangaroos are hopping and also when they are
crawling around on the ground to feed. Spider monkey tails are useful when the
spider monkeys are moving through trees. Both of these animals use their tails
primarily for —
F grabbing and holding their food
G supporting and balancing their body
H attracting the attention of other animals
J carrying their young
G supporting and balancing their body