It was influential on the improvement of weapons during WWll.
Answer:A weak immune system
Explanation:
When people get older their immune system becomes weak including the function of the T cells which are cells responsible for fighting infections.
This means it becomes hard to recover from a flue when someone get sick and they are always prone to sickness since their immune system no longer has the power to fight infections.
Answer:
Predictive validity.
Explanation:
A Predictive validity test is the test that is taken to predict the future performance of the applicant based on the scores in the test. The test is useful in predicting the future, as suggested by the name.
The tests that are taken before allowing a person in any organisation are often predictive. A pre-employment test is such example.
<u>In the given case, the entrance exams are also an example of predictive validity. It is because based on the scores scored by a student will help the university authorities about the performance of the student</u>.
So, the correct answer is predictive validity.
It helps determine whether a site is safe from landslides, floods, and natural hazards.