When immunity to a disease is acquired naturally through a response of ones immune system it is called: ?

Acquired (adaptive/specific) immunity is when a person's immune system encounters foreign invaders and recognizes the toxin called antigen. The components of acquired immunity learn how to attack each antigen and begin to develop a memory for that antigen, adapting to the foreign toxin.

i think that the best answer would be c.

tell me if im wrong : )

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.