Answer:
there are many reasons behind it but some of them are:. due to weak financial status, poverty,lack of proper education and awareness,lack of support or guidance from family members, unemployment etc.
Answer: Longitudinal research
Explanation:
Longitudinal research is the research study that is carried out by the researchers through observation technique. Information and sample are collected on the same project over a time period to observe any kind of change.
These researches can take huge amount of time such as may years to notice the alteration on the repeated observation.This study is carried out on the same individual or same group of individuals s the subject.
"The mass of Substance C is five times the mass of Substance B", the given statement is correct.
Answer: Option D
<u>Explanation:</u>
As Jessie added 16 gm. of Substance A to 4 gm. of Substance B Obtained certain amount of Substance C which can be calculated as follows:
amount of Substance C = Substance A + Substance B = 16 + 4 = 20 gm
Therefore, 20 gram of Substance C was obtained. Here, fourth statement is correct which says the mass of Substance C ifs five times the mass of Substance B to justify this, see the below: