Hydroelectric dams, nuclear power plants, coal-fired plants, and solar panels are ways electricity can be produced. Which method has the least ecological impact when producing electricity?

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen