Question

any form or change of form which distinguishes grammatical forms of the same lexical unit
reduplication
etymology
neuter
conversion
other:
when the meaning of a word expands or becomes more inclusive than its earlier meaning
broadening
etymology
neuter
pejoration
other:

Explanation:

1. The first question describes a form - change within the same lexical unit for grammatical distinction. Conversion is a word - formation process where a word changes its part - of - speech without adding an affix, which fits the description. Reduplication is the repetition of a word or part of a word. Etymology is the study of word origins. Neuter is a grammatical gender.
2. The second question refers to a word's meaning expanding. Broadening is the semantic change where a word's meaning becomes more general or inclusive. Etymology is about word origins, neuter is a gender category, and pejoration is when a word's meaning becomes more negative.

Answer:

1. Conversion
2. Broadening