Answer:
They are both mammals with tails.
Explanation:
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The steeper the slope of the track the quicker the toy car will accelerate.
More than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described.
