The Letter A

Adam

Genesis 2:7 (Creation of Adam)
"Then the LORD God formed a man from the dust of the ground and breathed into his nostrils the breath of life, and the man became a living being."

Ark

Genesis 7:9

"They entered the boat in pairs, male and female, just as God had commanded Noah."

Angel

Psalm 91:11-12
"For he will command his angels concerning you to guard you in all your ways; they will lift you up in their hands, so that you will not strike your foot against a stone."