FREE POINTS HURRY AND TAKE THEM AND FIRST WILL GET BRAINLIEST

This is science by the way which of the following is an example of an environmental pressure a. the air pressure in the atmosphere b. a lake that is gradually running out of water c. a fight between two members of the same species d. breeding between two members of the same species

Afour-cylinder engine is described as having a port-type efi fuel system. in most cases, how many injectors would you expect the engine to have? a. 8 b. 0 c. 1 d. 4

50 ppm (50 mg/kg) is equal to 0.005%. how many ppm is equal to 5%?