The first.
The first syllable, "cab", has the primary stress.
first syllable - grass
The primary stress in the word "contrast" is on the second syllable, "trast".
The primary stress in the word possibilities falls on the fourth syllable, "si-."
The third syllable.
The primary stress in the word "organization" falls on the third syllable.
The primary stress in the word "machine" is on the first syllable, "ma-".
The primary stress in the word "access" is on the first syllable, "ac-".
The primary stress in the word "comfort" is on the first syllable, "com."
primary stress of camera
Literary is stressed on the first syllable.
The primary stress in the word "secretary" falls on the second syllable - "re".