A raised-bed garden is a type of gardening method in which the vegetables and other small plants are grown in garden boxes kept elevated above the ground. These garden boxes are kept separated from each other.
The advantages of having a raised-bed garden are:
1. The movement of harmful pest from crop to another is hindered.
2. It prevent the compaction of the soil.
3. It stops the propagation and growth of weeds from one box to another.
4. It provides better drainage of water from the soil.
5. The walls of the garden box prevent the erosion of the soil.
6. The garden boxes conserve space.
Hence the answer will be B. conserve water and space for growing and limit compaction of the soil.
Hypoxic waters kill high levels of aquatic species, disrupting the food chain and habitat. In addition to wrecking ecological havoc, the dead zone can be a financial drain on coastal communities.
Answer: Increase in species numbers and diversity
Explanation:
Upwelling is an oceanographic phenomena in which the water from the bottom layers of the ocean usually above the seafloor get displaced and reach upto the surface layers with the effect of wind currents. The water carries away along with it the nutrients and the organic matter to the surface layers which allows the efficient growth of plant and planktonic diversity which favors the growth of sea animals like fishes and others. Hence, by this way the species diversity and numbers increases by the process of upwelling.
Out of the three, only 1 is acidic because litmus paper turns red in acidic compounds and blue in basic compounds.
