Read the sentence.
What is the best word to replace the infinitive in the
sentence?
Once the scientist completed to assemble the components,
she tested her new device to see if it performed as
expected.
assembling
assemble
assembled
assembly

The details about the statues, i believe, are that they're carved from blocks of igneous stone, many of them are partially buried under the ground which to preserve and protect them from the harsh environment on easter island, and many of the facial features have washed away. also, the most well-preserved one is at the british museum in london.these are just guesses from what i can see and what i think i read correctly. i'm sorry i couldn't be more .