What is an official agreement made by two or more parties

The provisions of subpart d, of the hhs regulations, additional protections for children involved as subjects in research apply to: all research involving childrenall research that is > minimal riskall research funded by any federal agencyall research funded by hhs

Which are components pf a political party? why do we need political parties give reason.

Oil is a renewable resource can be used directly from the ground is the least polluting energy source must be removed from the earth using drills