Number 2.
It should be choose not chose
If you mean biotic, then its probably abiotic and biotic factors. It is the interaction between organisms and their environment.
<span>A) The comma attempts to set apart an essential element.
One comma rule is that you cannot use commas to set off essential parts of the sentence. The usage of two commas can only go around nonessential clause, meaning a clause that can be removed and the sentence will still make sense. However,</span><span> clauses beginning with a "</span>that"<span> that follows a noun are always essential! </span>
Well it would probably be because it's set into a more modern area and they're more familiar with that time period.
He joked that he was to be punished with free meals