Answer:
Industrial and vehicular emissions and agriculture. :)
Explanation:
Answer:
internal validity
Explanation:
The internal validity measures the degree to which the research is correct. This is done by determining the number of confounding variable.
A confounding variable is the variable that influences both the independent and dependent variable. Only the independent variable should influence the dependent variable.
When the confounding variables found in the research is low the internal validity of the research increases and if the confounding variables found in the research is high the internal validity of the research decreases.
Here, Professor X is worried that a confounding variable is influencing his dependent variable so he is concerned about the internal validity of his experiment.
People having an autistic child in the family face a lot of problems in their day-to-day lives. And of all the people, the mother who is majorly raising the child faces a lot of challenges both emotionally and mentally.
Autistic child may be hard to handle at various point which may lead to emotional, mental, and social stress on the family members. As the mother generally does the household work with addition to it taking care of an autistic child can be difficult.
According to many surveys it has been reported that the mother of an autistic child is more prone to depression than any other disabilities comparatively. Also, the career of such parents, their financial conditions, their relationship with each other may also become a hassle while living with autistic children.
To know more about autistic child refer to the link below
brainly.com/question/5652064
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<span>Humus decreases the porosity of soil </span>
