Some plants were protected from grazers by:

thorns
eagles
roots

A. Thorns

Explanation:

Some plants like roses or raspberries have thorns on their stems to keep other herbivores like deers or elk to eat them. It is a natural habit of them.

-- Juri Davis

a countries leader should be motivated by the common good of the country.

on this day in 1913, henry ford installs the first moving assembly line for the mass production of an entire automobile. his innovation reduced the time it took to build a car from more than 12 hours to two hours and 30 minutes.