<span>The correct answer is D: all of the above. Pollution has many negative effects on both the human population and the environment. If the air and water is heavily polluted, it can contaminate the human population and cause illnesses and even death. It can also taint natural resources making them unusable</span>
Answer:
b. ex post facto or quasi-experimental.
Explanation:
An ex post facto search is done when a researcher cannot manipulate one of the variables such as sexual behavior or smoking (as described in the question), ie this type of research is done when it is not possible to manipulate the independent variables as they already arrive ready for research. Ex-post fact research deals with variables that are unmanipulated in nature. Quasi-experimental research can also be done for this same situation.
I think it’s that because it became very popular and basic to all people
Answer:
No hablo español, ¿puedo copiarlo y pegarlo para ponerlo en un traductor?
Explanation:
esa es la única forma en que puedo ayudar
It is true that when you participate in a cardio-respiratory activity, you want your heart rate to stay elevated over an extended period of time.
<h3>What is cardio-respiratory endurance?</h3>
Cardiorespiratory endurance is a physical activity that measures how well the heart, lungs, and muscles perform during moderate to high-intensity physical activity.
Cardiorespiratory fitness can be improved by conducting series of physical exercises like aerobic exercise.
Therefore, it is true that when you participate in a cardio-respiratory activity, you want your heart rate to stay elevated over an extended period of time.
Learn more about cardio-respiratory endurance at: brainly.com/question/1194142
