The four main spheres of the exterior of earth are the

a : atmosphere, cryosphere, hydrosphere, and lithosphere
b : anthrosphere, atmosphere, cryosphere, and biosphere
c : atmosphere, lithosphere, biosphere, and hydrosphere
d : atmosphere, lithosphere, biosphere, and gemosphere

Marissa is a high school student who wants to be a hydroelectric production manager. she talks to her guidance counselor about her education path, and the counselor says that she needs to get an associate’s degree from a four-year college and will follow that with significant on-the-job training. what error did the counselor make while advising marissa? marissa will not have on-the-job training. marissa also needs a three-year apprenticeship. marissa only needs to attend a two-year college. marissa needs a bachelor’s degree.

Why should characters such as / \ " ' * ; - ? [ ] ( ) ~ ! $ { } < > # @ & | space, tab, and newline be avoided in file names?

Apython programming question: assume s is a string of lower case characters. write a program that prints the number of times the string 'bob' occurs in s. for example, if s = 'azcbobobegghakl', then your program should print number of times bob occurs is: 2