Decide whether the drawings, shown below, are acceptable lewis diagrams for the species indicated.

Changing environments and ecosystems were driving the evolution of horses over the past 20 million years. ... "According to the classic view, horses would have evolved faster in when grasslands appeared, developing teeth that were more resistant to the stronger wear that comes with a grass-dominated diet.

Explanation:

Over time, there wasn’t much things that we had now. in the old times they used horses to travel and hunt for wild animals. But now theres a centry, where we have modern technology.