The diagrams below show the development of the horse over a period of 40 million years. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram illustrates how the horse evolved within 40 million years, especially its

foot

structure.

It is clear that

there are 4 main stages of

this

development, starting with the Eohippus at first and ending with the current horse nowadays. As can be seen, 40 million years ago, the Eohippus with a really short tail was not as big as its descendants.

Moreover

, what made it special was that its

foot

comprised 4 toes which were quite small. About 10 million years later, Mesohippus appeared with a bigger body and longer tails.

However

, its

foot

changed as it only had 3 digits.

Additionally

, in the third stage, Merychippus had the same size as the previous Mesohippus,

nevertheless

, the mane started to grow and the middle toe grew prominently.

Finally

, the modern horse as we see it today, has the longest tail compared to its ancestors. The mane is large and the

foot

structure evolves to just one single digit.