All but one of the factors listed is a major contributor to world population increases. that factor is a) increased birth rate b) decreased death rate c) increase immigration to foreign countries d) an increase in the quality of medical care

D) Increase the quality of medical care.

The major cause of population explosion or increases is due to increased birth rate and decreased death rate. Due to rapid development of science and technology, the medicinal field has improved its quality in all aspects.

During past periods, birth rate was decreased due to premature delivery, fetus born death, death during pregnancy, etc. But now due to increase in the quality of medical care, these entire problems have been rectified and the birth rate has increased which has paved way for population increase.

a. as the temperature increases, the kinetic energy of the gas molecules increases & the molecules move faster & further away from each other.

b. if you decrease the temperature of a fixed amount of gas at constant pressure, the combined gas law reduces to charles's law. in this case, volume will also decrease.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.