Mr. Waller's students are working in cooperative groups. Just prior to the transition to the next activity, which will require each student to use colored pencils and scissors, Mr. Waller rings a small bell. He tells the children that they have two minutes to finish up what they're doing. Mr. Waller's strategy is:

scaffolding

Explanation:

In simple words, Educational scaffolding can be understood as the method under which a teacher provides supports to learners' education in order to help them accomplish tasks. The instructor accomplishes this by expanding on the pupils' prior encounters and understanding as they acquire new abilities. Thus, from the above we can conclude that the correct answer is scaffolding.

the biopsychosocial approach was developed at rochester decades ago by drs. the biopsychosocial approach systematically considers biological, psychological, and social factors and their complex interactions in understanding health, illness, and health care delivery.

explanation:

answer; ok in rural area most people depend on private transportation(cars),pick up truck,donkey and buggy: ),and urban people can walk or ride public transportation,bus,train cab,uber.