The ozone layer keeps harmful rays from the sun also the atmosphere burns up small deburey from rockets, space trash ex. Also small rocks and particles can get burned before hitting the earth. One of the greatest things is it keeps spefic gasses needed for life like oxygen in the world.
The main threats to river basins (the entire area drained by a river) continue to mount.
Construction of large dams and physical alterations of river flow by straightening and deepening of river courses.
This disrupts the natural flooding cycles, reduces flows, drains wetlands, cuts rivers off from their floodplains, and inundates riparian habitats, resulting in the destruction of species, the intensification of floods and a threat to livelihoods in the long term.
Answer:
Let's organize this with the four biomolechules:
-NUCLEIC ACID (Nucleotides, Polynucleotides, Phosphodiester linkages)
-LIPIDS (Fatty acids, Triacylglycerols, Ester linkages)
-PROTEINS (Polypeptides, Pepptide bonds, Aminoacids)
-CARBOHYDRATES (Monosaccharides, Polysaccharides, Glycosidic linkages)
Explanation: