Geothermal energy sources that can produce steam are located where bodies of magma are relatively close to Earth's surface.
At which regions would these steam-producing energy sources occur?
regions with very hot climates
B regions within stable continents
regions with recent volcanic activity
O regions at latitudes close to the equator

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

all eukaryotic cell have mitochondria : )