Questions

Teens drinking are at risk of date rape, becoming an alcoholic, HIV and other STDs.

TRUE, the compounds are formed as a result of chemical change.

Skimming is the removal of any material or particles that are floating on the surface. Hence, Removal of oil and grease from sewage - waste water is called as skimming.

The repeating units that are used to form the helical DNA structure are called nucleotides.

Brazil is one example of a closed economy in the given options. 

A closed economy is one that has no trade activity with outside economies. A closed economy is self-sufficient, which means no imports come into the country and no exports leave the country. A closed economy's intent is to provide domestic consumers with everything they need from within the country's borders.

Assemblers are used to translate a program written in a low-level assembly language into a machine code (object code) file so it can be used and executed by the computer.

Hence, Assembler is the translator program used in assembly language.