Question

2. The heterogeneous catalysts are
(a-simple and cheap
(C) expensive and simple
(b) complicated and cheap
(d) complicated and expensive.​

Answer 1

Answer:

Friendship is a relationship of mutual affection between people.[1] It is a stronger form of interpersonal bond than an association, and has been studied in academic fields such as communication, sociology, social psychology, anthropology, and philosophy. Various academic theories of friendship have been proposed, including social exchange theory, equity theory, relational dialectics, and attachment styles.

Answer 2

answer...srry..

not..

..... sure