Who coined the term ‘ecosystem’ ?

Consider the following statements and select the correct answer with the help of codes given below:

(A) There is a special way of reading and writing for people who can’t see. It is called Braille.
(B) It is written on a thin paper (almost carbon copy paper) by making a row of raised points (dots) with a pointed tool.
(C) Braille is read by running the fingers on the raised dots.
(D) The Braille script is based on nine points.

Codes:

Which of the following converts milk into curd? Choose the correct answer with the help of given codes.

(A) Bacteria
(B) Virus
(C) Fungi
(D) Protozoa

Codes: