What type of variable star is shown in the image above?
A. Cepheid variable
B. Delta scuti variable
C. Stochastic variable
D. Lyrae variable

"Delta scuti variable" type of variable star is shown in the given image.

Option: B

Explanation:

AI Velorum stars also popular as the high-amplitude Delta Scuti variables. Fath discovered the instability of the prototype of these sort of stars in 1935 while Smith named these objects Dwarf Cepheids in 1955 as they appeared unique from RR Lyrae stars due to their greater metallicity and distinct relationship between time and luminosity. After white dwarfs, these variables are the second leading source at Milky Way. Delta Scuti stars show pulsations of both radial and non-radial luminosity.

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.

the scientific method.