literary terms help?

Question

Ive looked on the internet but i still dont understand:

apostrophe (the literary term one)
invocation
consonance (whats the difference between this one and alliteration?)
please say what each means and give an example

Answer 1

Apostrophe: The direct address of an absent or imaginary person or of a personified abstraction, especially as a digression in the course of a speech or composition.

Invocation: any petitioning or supplication for help or aid, especially help from deities or spirits. (The spirits answered to their invocation)

Consonance: the correspondence of consonants, esp. those at the end of a word, in a passage of prose or verse. (Strong and String; Blank and Blink)

Alliteration: the commencement of two or more stressed syllables of a word group either with the same consonant sound or sound group (consonantal alliteration), as in "from stem to stern", or with a vowel sound that may differ from syllable to syllable (vocalic alliteration), as "in each to all".

Answer 2

consonance is a repetition but u specifically repeat consonants with this one.
im nt sure about an example.