Taken as a measure against something possible or anticipated; preventative.
Another area of intelligence that corvids have been found to excel in is problem-solving. In one study, crows were presented with a puzzle box containing food. The box had a small hole in it, but the crows were unable to reach the food through the hole. However, the crows were able to figure out that by dropping stones into the box, they could dislodge the food and obtain it. Taken as a measure against something possible or
Answer: Stones.
In the IELTS Reading test, time is your enemy. Do not read every word the first time you see the passage. Taken as a measure against something possible or