What is an antibiotic?
A) A synthetic chemical that kills bacteria
B) An organism that inhibits the growth of other organisms
C) A chemical that inhibits microbial growth
D) All available answers are characteristics of an antibiotic.

Option D

Explanation:

Antibiotics can be defined as the chemical compound that helps in killing or stopping the growth of microbes inside the body.

These chemical substances are used in the case of bacterial infection inside the body. These substances when goes inside the body alters the growth of bacteria causing infection.

There are various method of action of antibiotics by which it inhibits the growth of bacteria.

Example: Penicillin, tetracycline, streptomycin are some of antibiotics.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

i am sorry but i need more information and a picture.