Which of the following happens when a low-mass star runs out of fuel? choose all that apply.
a. its outer layers expand, and the star becomes a red giant.
b. its outer layers form a nebula, or a vast cloud of gas and dust.
c. its core becomes a white dwarf.
d. gas and dust in a nebula contract to form a protostar.

Identify, in detail, three environmental effects of agriculture and explain how the actions of farmers cause them. what is the relationship between poverty and obesity in america and why? what are genetically modified organisms? list two pros and two cons for using genetically modified organisms. y'all this is due !