Meaning: 'Float' means to rest or move on the surface of a liquid without sinking, which is exactly what happens in the Dead Sea due to its high salt content.

Wrong options:

• reconstruct: 'Reconstruct' means to build or form again, which does not relate to the action of bathers in water and is grammatically incorrect in this context.
• sink: 'Sink' implies going down below the surface, which contradicts the buoyancy effect of the Dead Sea's waters, making it an illogical choice here.
• assert: 'Assert' means to state a fact or belief confidently, which does not fit the context of physical action in water.

Correct answer: dropping

Explanation: The word 'dropping' accurately describes the decrease in water level, fitting grammatically as it is in the present continuous tense, which aligns with the ongoing situation of the Dead Sea.

Meaning: 'Dropping' means to fall or decrease in level, which is appropriate for describing the declining water level of the Dead Sea.

Wrong options:

• paralleling: 'Paralleling' means to be similar or analogous, which does not convey a change in water level and is grammatically incorrect in this context.
• rising: 'Rising' suggests an increase, which contradicts the information about the water level decreasing, making it an incorrect choice.
• keeping: 'Keeping' implies maintaining a level, which does not fit the context of a declining water level.

Correct answer: shape

Explanation: The noun 'shape' refers to the form or outline of the Dead Sea, fitting grammatically as it is a singular noun that matches the context of comparing past and present conditions.

Meaning: 'Shape' means the external form or appearance of something, which is relevant when discussing changes in the Dead Sea's surface area over time.

Wrong options:

• access: 'Access' refers to the ability to approach or enter a place, which does not relate to the physical characteristics of the Dead Sea and is grammatically incorrect here.
• grate: 'Grate' means to shred or irritate, which is unrelated to the context of describing the lake's characteristics and does not fit grammatically.
• found: 'Found' is the past tense of 'find,' which does not logically connect to the comparison of the lake's current and past state.

Correct answer: revealed

Explanation: The verb 'revealed' indicates that the salt formations become visible as the water recedes, fitting grammatically in the past participle form, which aligns with the context of ongoing changes in the landscape.

Meaning: 'Revealed' means to make something known or visible, which is appropriate as the drying up of water exposes the salt formations.

Wrong options:

• overwhelmed: 'Overwhelmed' means to be buried or overpowered, which does not fit the context of salt formations becoming visible and is grammatically incorrect here.
• conserved: 'Conserved' means to protect from loss or harm, which does not relate to the visibility of formations and is not suitable in this context.
• enhanced: 'Enhanced' means to improve or increase, which does not accurately describe the process of salt formations becoming visible as water dries up.