Which situation would result in interference? plis i need help this is the unit test and i have to pass a wave bouncing off an object
a wave bending as it moves through an object
a wave scattering as it moves through an object
a wave increasing in energy as it hits another wave

A wave increasing in energy as it hits another wave

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.