Answer:
Those specific plants were having significantly high death rates to probably something eating them so overtime they evolved defenses to make them less desirable.
Explanation:
So, just a problem with predators to make it simple. They needed to evolve to better survive.
The 2nd one is the correct answer based on the question's topic
it was a period of a lifestyle that revolved around hunting and gathering agriculture. it was also known as the agricultural revolution. it begun about 12,000 years ago.
