Examlex
In each of the sentences below, select the letter for the word that most exactly and vividly completes the sentence. ____ boards make the porch dangerous.
Precambrian
The earliest part of Earth's history, spanning the time from the formation of the Earth to the start of the Cambrian period, about 4.6 billion to 541 million years ago.
Paleozoic
An era in Earth's geologic history that occurred from about 541 million to 252 million years ago, characterized by the emergence of early life forms.
Inhospitable
Describing an environment that is harsh, difficult to live in, or unwelcoming to life, often due to extreme conditions.
Correlate
To establish a mutual relationship or connection between two or more things.
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