Cancer is often characterized by tumors. which would most likely trigger the formation of a tumor?
a parasite that both lived and reproduced within the human body
b. a mutation in a gene that codes for a protein regulating cell division
a change in the dna sequence of a gene that codes for skin coloration
a bacterial infection that caused inflammation and swelling in the body tissues

The correct answer is b a mutation in a gene that codes for protein regulating cell division.

Explanation:

Cancer is a disease that result due unregulated cell divison.There are many tumor suppressor protein present in our body such as retinoblastoma tumor suppressor protein,p53 protein.

     These tumor suppressor protein helps to carry out cell divison in a regulated fashion and send signal for division only to that cell that have undamaged DNA.

   Mutation in the gene encoding tumor suppressor protein leads to development of cancer.

i believe the answer is a or 1

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.