In the second half of the 19th century, humans used all of the following technological advances to modify and adapt to the physical environment except:
a. bessemer process
c. telephone
b. automobile
d. telegraph

In the second half of the 19th century, humans used all of the following technological advances to modify and adapt to the physical environment except "the telephone," since although this technology was invented in 1876, it wasn't widely implemented for some time. 

I’m pretty sure it’s 4, you can check on the calculator