Number 2 is the correct answer.
Reptiles and amphibians are <u>cold</u><u> </u><u>blooded</u><u> </u><u>and</u><u> </u><u>need</u><u> </u><u>to</u><u> </u><u>stay</u><u> </u><u>in</u><u> </u><u>warm</u><u> </u><u>environments</u> to ensure survival. Mammals are found in the tundra which makes 4 incorrect.
<span>In the year 1784, Thomas Jefferson (third president of the United States of America) directed in the state of Virginia, USA the first ever controlled excavation of an olden burial mound. This is known to be the first scientific archaeological excavation in history. </span>
Here's a snip of the answer below!! :D