<span>The Department of Homeland Security oversees border safety and security (including immigration and customs); emergency preparedness; science-related concerns pertaining to chemical, biological, and nuclear threats; and information and intelligence analysis and assessment.</span>
Answer:
A protozoan typically goes through multiple phases, which vary morphologically and functionally throughout its entire lifespan. It generally undergoes two stages of biological life cycles, with proliferative phases or Trophozoite and latent cysts. First, the encystment phase, and second, the conjugation phase.
Explanation:
The correct answer is letter c. traps heat.
The Earth's Atmosphere deals with the sunlight it absorbs in the day, absorbing it and spreading it, which heats up the planet, but at night, the sunlight absorbed weakens and the Earth cools up, but due to the greenhouse effect, it traps certain amounts of heat, which results to hotness of the weather. Greenhouse Effect doubles the heat, because it traps heat when heat tries to leave our atmosphere.
Choice A is the correct choice, The graduation rate in a city and the rate of unemployment in that same city would not have a positive correlation.
