Both a and b is an example of population increase of favored organisms.
Tides are gravitational pulls between the earth, the sun, and the moon. A method that is currently used to monitor tides would be measuring the distance from the sun, moon, and Earth.
Researchers and doctors hope stem cell studies can help to increase understanding of how diseases occur, and to better understand how diseases and conditions develop.
Answer: 1.9 million species
Explanation: I looked it up
