PLEASE HELP!

How are these two passages similar?
A.
They both teach the reader about fossilized marine plants and animals.
B.
They both explain the effect of large river systems on marine animals.
C.
They both demonstrate the effect of water on living things.
D.
They both focus on the development of lush gardens around the world.

Passage 1

Spreading over the green-hued fields of County Galway, Ireland, Brigit’s Garden celebrates Irish folklore, mythology, and heritage. Because of the climate-moderating effects of the nearby Gulf Stream, and an abundance of water, a surprising array of colorful flowers, herbs, and vegetables thrives in this garden, which reflects the four seasons and the cycle of life. This magical Irish garden is a year-round island of serenity. The Garden Café specializes in “slow” food gathered from the garden and is considered one of the best dining experiences in Ireland.

Passage 2

People lived on the edge of the Sahara desert in North Africa thousands of years ago, since the last ice age. The climate of the Sahara was much wetter then than it is today. Evidence of this can be seen in the 30,000 petroglyphs, or rock drawings, of river animals such as crocodiles and hippopotamuses. Scientists have found a wealth of fossilized plants, and fossils of marine dinosaurs have also been found here. The modern Sahara, though, is not lush in vegetation, except in the Nile Valley, at a few oases, and in the northern highlands where Mediterranean plants such as the olive tree grow. The region has been the desert we know today for about 5,000 years. Some 2.5 million people currently live in the Sahara, almost all of them on the desert’s edge in Egypt, Morocco, and Algeria.

" Because of the climate-moderating effects of the nearby Gulf Stream, and an abundance of water, a surprising array of colorful flowers, herbs, and vegetables thrives in this garden,..."

In passage 2, there's indirect description of effects of water on the living things. The passage is talking about the climatic conditions of Sahara Dessert when the climate was wet, there were river animals such as crocodiles and hippopotamuses.

"People lived on the edge of the Sahara desert in North Africa thousands of years ago, since the last ice age. The climate of the Sahara was much wetter then than it is today. Evidence of this can be seen in the 30,000 petroglyphs, or rock drawings, of river animals such as crocodiles and hippopotamuses"

The passage is also comparing the climatic conditions of Sahara Dessert thousands years ago and modern Sahara.