Read the following sentence carefully and select the pair of words from the given choices that appropriately fills the two blanks to render the statement grammatically correct and meaningful.

Invaluable ______________ of the past lie ______________ alongside the ancient shipwreck deep within the ocean floor.

The correct choice to fill in the blanks is relics, submerged.

Step-by-step Explanation:

1. First Blank Analysis:
The sentence reads: "Invaluable ______________ of the past lie..."
- The verb "lie" is plural, which means the subject preceding it must be a plural noun.
- relics refers to objects or artifacts surviving from an earlier time, which is a plural noun that fits perfectly both contextually and grammatically.
- "item" is a singular noun and grammatically incorrect with "lie". "evidence" is typically uncountable, making "evidences" inappropriate here.

2. Second Blank Analysis:
The sentence continues: "...lie ______________ alongside the ancient shipwreck deep within the ocean floor."
- The blank describes the physical state of the objects lying deep underwater.
- submerged means covered or sunken underwater, which logically and grammatically describes items lying alongside a shipwreck on the ocean floor.
- Options like "floats", "sink", or "skyward" do not make grammatical or contextual sense here.

Putting both words together completes the sentence meaningfully:
"Invaluable relics of the past lie submerged alongside the ancient shipwreck deep within the ocean floor."