Consider the keyboard on a typewriter, a laptop, and a smartphone would you consider these to be homologous structures or analogous structures?

Analogous structures

Explanation:

Homologous structures are the one that may look alike by appearance but may not serve the same purpose.  

While analogous structures may look different from each other but have similar function.  

The purpose of having a keyboard is same in case of a typewriter, a laptop, and a smartphone though they look different from each other. Thus, they can be considered as analogous structure.  

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and colour.

explanation:

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.