(a) Three broad classes of manufacturing industries are
(i) Cottage or craft industries e.g West Africa
(ii) Light industries e.g India
(iii) Heavy industries e.g USA.
(b)(i) Three main characteristics of cottage or craft industry
(i) It involves very few people working at home
(ii) It not require power-driven machines
(iii) Special skills are required.
(bii) Three characteristics of light industries
(i) They produce relatively small light weigh goods
(ii) Products are mainly final or consumer goods
(iii) They usually employ a lot of female workers
(biii) Three characteristics of heavy industries
(i) They produce heavy and bulky goods
(ii) Products are neither final nor consumer goods but are used in construction or manufacturing industries
(iii) they usually employ male workers due to the nature of work involved.