PLEASE HELP I"LL GIVE BRAINLEST!!! Which of the following statements is true?

Burning fossil fuels puts oxygen in the air, which may cause global warming.

Burning fossil fuels puts carbon dioxide in the air, which may cause global warming.

Burning fossil fuels puts carbon dioxide in the air, which may cause global cooling.

Climate like that in the sahara desert have the fastest rates of weathering

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen 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. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody

While washing her hair olivia noticed that she was losing a lot of hair she visited a clinic and the physician reassured her that her hair would grow back how do you think olivias hair will grow back