Answer:
The act of measuring
The law of stars
Step-by-step explanation:
A suffix is a morpheme added after the stem of a word to form a derivative, i.e. a new word. Here, you were given two examples of suffixes - -ment and - nomy, and their meanings.
The word measurement is derived from the verb to measure (measure + -ment = measurement). Based on the meaning of the suffix -ment, we can conclude that the meaning of the given word is the act of measuring.
The word astronomy is of Greek origin (astronomos - literally translated as the science that studies the laws of the stars). The root of the word (astro) is derived from the Greek aster, which means a star. Based on this and the meaning of the suffix -nomy, we can conclude that the meaning of the word astronomy is the law of stars.