Desert tortoises are designed to thrive in their environment. their front legs are flat like paddles, which them dig. they make burrows to sleep in and for protection. their back legs are short and sturdy to them
evenly distribute their body weight and walk in sand.

an inference that can be made from this paragraph is that desert tortoises have natural enemies that they must hide
from. which response provides the most effective support for this inference?

a. desert tortoises are designed to thrive in their environment.

b. desert tortoises make burrows to sleep in and for protection.

c. desert tortoises have front legs that are flat like paddles.

d. desert tortoises can walk in sand because of their legs.

The “big dig” the “big dig” (the central artery/tunnel project) has been complex and challenging. located in boston, massachusetts, this tunnel is eight lanes wide and three-and-a-half miles long. what is most amazing about this tunnel is that it is constructed under a major highway and skyscrapers located in boston’s financial district. construction crews used “clamshell excavators” during this dig. these machines carved narrow trenches, and then a special substance was pumped into the trench to keep the dirt from caving in. finally, steel beams were lowered into the trench and concrete was pumped in. one problem that engineers faced while constructing the tunnel is the fact that the soil beneath boston is extremely loose and soggy. engineers solved this dilemma by freezing the soil and pumping very cold water into pipes beneath the city. to strengthen the soil even further, a special type of glue was injected into the ground to with the consolidation of the soil. 23 which phrase best defines the word excavator as used in the passage? a. a device used to measure underground temperatures b. a device used to level uneven surfaces c. a device used to move heavy objects d. a device used to dig holes