<span>February 29 is a date that usually occurs every four years, and is called a leap day. This day is added to the calender in leap years as a measure, because the earth doesnt orbit around the sun in exactly 365 days (1 year). The gregorian calendar is a modification of the julian calender first used by the romans. </span>
<span>SMCRA stands for the Surface Mining Control and Reclamation Act of 1977 (SMCRA). The SMCRA is a federal law that controls how much the coal mining companies can pollute the environment. The Surface Mining Control and Reclamation Act regulates how old mines are reclaimed in addition to controlling how new coal mines are opened and how they operate.</span>
1. The Andes Mountains" is the <span>one result of the tectonic activity between the Nazca plate and the South American plate. The correct option among the options given in the question is option "D".
2. "A parka" is the item that </span><span>would be a must-have when visiting Tierra del Fuego. The correct option is option "C".</span>