Answer:
the answer is 'rectilinear propogation of light'
Explanation:
<span>Primary immunodeficiencyvdiseases are a group of more than 250 rare, chronic disorders that affect how the body’s immune system works. Primary immunodeficiency diseases are caused by genetic defects. I hope this helped</span>
Around Autumn as the temp and pH of soils are vlose the the optimum
