Question

1. (1) ... (5) ... 2. (6) the salt water and the salt crust of the saline both contain minerals people need for different reasons. (7) there are high quantities of sodium, which is what we consider basic table salt, and which people need to ingest in small quantities to stay healthy. (8) there is also potassium, boron, lithium, and magnesium. (9) some of these minerals are used in medications, some are used to make batteries (you have no doubt heard about \lithium - powered electric batteries\), and some are used, as mentioned, to season our foods. 18. what is the most effective way to combine sentences 7 and 8? there are high quantities of sodium, which is useful as common basic table salt - as well as potassium, boron, lithium, and magnesium - and which people need to ingest in small quantities to stay healthy. there are high quantities of sodium - which is what we consider basic table salt - which people need to ingest in small quantities to stay healthy, there is also potassium, boron, lithium, and magnesium. there are high quantities of sodium - which is what we consider basic table salt, and which people need to ingest in small quantities to stay healthy - as well as...

Explanation:

To determine the most effective way to combine sentences 7 and 8, we need to ensure coherence and logical flow. Let's analyze each option:

• Option 1: The structure "which is useful... as well as..." is a bit awkward. The focus should be on the nutrients people need, and this option separates the list of minerals in a less smooth way.
• Option 2: This option first introduces sodium (table salt) and its importance, then uses "there is also" to list the other minerals (potassium, boron, lithium, magnesium). This creates a clear and logical flow, connecting the main nutrient (sodium) to the additional ones.
• Option 3: The phrase "as well as" at the end makes the sentence less cohesive compared to Option 2's clear separation of the main nutrient and the additional ones.

So, Option 2 is the best choice as it maintains a clear and logical flow when combining the two sentences.

Answer:

The second option (the middle one) with the text: "There are high quantities of sodium - which is what we consider basic table salt - which people need to ingest in small quantities to stay healthy, there is also potassium, boron, lithium, and magnesium."