Answer:
There is no actual way that the mantle could be...'exposed' or 'seen'. But scientists have managed to find multiple ways to analyze the mantle and it's actual existence by using multiple devices. The mantle is basically a 2,900 kilometers (1,802 miles) thick blocks of rocks and minerals underneath the crust(or the surface of the earth) , and makes up a whopping 84% of Earth's total volume.
Populations
communities
ecosystem
biosphere
Photosynthesis takes place in B. In chloroplasts because that's where the plant's green color is produced.
They reproduce sexually and asexually