Distinguish between spiral and elliptical galaxies in terms of the presence or absence of a disk component and halo component. How does this difference explain the lack of hot, young stars in elliptical galaxies?

Which of the following statements is true? a. there is not enough food produced in the world to feed everyone. b. the biggest cause of hunger and malnutrition is the cost of getting food to people who need it most. c. most countries have enough arable land and resources to feed their own population and export a surplus d. malnourishment is only seen in a few countries with very limited food supplies.

Hey, i was what is consisted in a sustainable city? like what unique designs they have, etc. for answering ; )

¿qué parte de la patagonia está en peligro de exinción por su sobrepesca?