In the book, the Social System in Islam, on the subject of marriage, (page 112 Arabic version / p. 113 English version), and the book we are using in (page 110, Arabic version / p. 113 English version) on the official site, the first paragraph says:

Attempts have emerged by some countries, especially Russia, China and the European Union, to replace the dollar with another currency in international transactions. Agreements have even been made to deal with the local currency of some countries, such as Russia's agreement with India on 31/10/2018, for the sale of S-400 missiles in the Russian currency.

It came in the book: “The Islamic Personality Vol. 3”, under the subject "The existence of the juridical (Shar'i) realities" what reads: "... it is established that the Shaari' (the Legislator) has informed the Ummah of transferring these terms from their linguistic (lughawi) meaning to a new meaning established by the Shariah, through the Prophet’s (saw) clarification of these meanings.

I have a question about what has been mentioned about causation in the book “Islamic Personality” (Volume 3); it was mentioned that the conditions for causation should be connected and related, but what is the difference between them?