Which component of blood protects us from invading foreign material? plasma erythrocytes thrombocytes leukocytes

Leukocytes also called as white blood cells are the cells of the immune system of the body that are responsible for protecting us from the invading pathogen and infectious disease.

The monocytes of leukocytes absorb large particles, granulocytes secrete chemicals or toxin for the infectious agent and the lymphocytes attack and kill bacteria and viruses that cause infections.

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.