A Bill of Exchange is a payment instruction - it says who will pay whom and when.
Bill of Exchange Definition: Examples and How It Works (investopedia.com)

Ex-Works has the lowest risk to the supplier- in Exworks the buyer collects the items directly from the supplier - so they have all the issues and risks of transporting it back home.
There are many question on Incoterms CIPS can ask. But as there's such a huge bank of questions it's really hit or miss if you'll get one of those question. Two students sitting the exam at the same time in the same study centre can get different question sets. One person can get 3 Incoterm questions and the other gets 0.
I would learn the major ones- the ones at the ends of the table in particular because these are the ones question are likely to be about. Ex works / Free carrier and Delivered at Place Unloaded/ De-livered Duty Paid in particular.
I like this graph as I'm a visual person. I think it makes it easier to understand than the study guide:
Shipping Incoterms: the Complete Guide - Guided Imports

GDP = gross domestic product = "the monetary value of goods and services manufactured or sup-plied in a financial period". People use it to say whether a country's economy is strong or weak.
Stock markets look at the value of public limited companies within a country.
Commodity indices look at the value of commodities such as steel, oil and wheat at a point in time Average changes in price over a year can be measured by CPI or PPI

Exchange rate fluctuations can significantly affect the cost of international contracts. The most direct way to eliminate this risk is to agree prices in the buyer's home currency (GBP Sterling). This passes the risk to the supplier, who must manage currency exposures through hedging or local arrangements. Using the exchange rate at delivery (C) retains exposure for the buyer, while financial analysis (A) and competitive tendering (B) don't address exchange risk. Responsible sourcing requires buyers to consider financial risk-sharing mechanisms as part of contract negotiations.
Reference: CIPS L4M4 Study Guide (v2), LO: "Application" - managing exchange rate risk in international sourcing.

Pregnant women and children are considered 'disadvantaged' by the UN. The other groups the UN call disadvantaged include; the elderly, the immunocompromised, those with disabilities and those living in poverty. This is the list given in the study guide.
A company could help disadvantaged groups in several ways. Firstly by offering employment (obviously not to the children). It could also include helping these groups as part of a Social Value out-come or community benefit scheme.