【多选题】Study the following four definitions and decide which are formal definitions.
A.
Anthropology may be defined as a branch of both science and sociology in which people, society and culture are studied.
B.
Physics is a branch of science in which forces such as heat, light, sound, pressure, gravity and electricity, and the way that they affect objects, are studied.
C.
The scientific study of language, especially language form, language meaning, and language in context can be defined as linguistics.
D.
Education is the process of facilitating learning , or the acquisition of knowledge, skills, values, beliefs, and habits .