Divergent boundaries becausr they are pulling apart
Answer:
D. Plastic sheeting, ultraviolet lights, dams, mechanical equipment and pesticides
Explanation:
The agriculture has changed significantly in the past couple of centuries. With the start of the industrial revolution, the agriculture was gaining more and more products and technologies to make it make easier for working, safer from pests, providing artificial conditions for the plants, and having higher quality and quantity. The mechanical equipment made the work much easier, cheaper, quicker, and more efficient, replacing lot of labor force. The pesticides have contributed to minimizing the effects of the pests. The dams are providing water for the plants where there's not enough in certain periods of the year. The plastic sheeting manages to stop weeds from growing, keeping higher temperature and moist for the plants, making them grow better and quicker. Some plants do not receive enough sunlight, or have to grown in regulated conditions, so the ultraviolet lights provide the needed light for them to prosper and perform photosynthesis.
The Earth’s interior is composed of several layers: the crust, the mantle and the core. Scientists used waves and their speed to study the Earth's interior. The speed of seismic waves is affected by the properties of the material the waves pass through. The stiffness of material affects the speed of these waves. P-waves, or pressure waves, go through both liquids and solids, while S-waves, or shear waves go through solids but not liquids. The following helped scientists understand that Earth's interior is liquid: S waves cannot travel through liquids. Correct answer: D
The European country that stretches from Eastern Europe to the Pacific Ocean is Russia.
