The ratio of effectiveness (output) to the cost of achieving that level of effectiveness (input) is defined as

Research shows that the more years of higher education a person has, the deeper and more ______ the person's reasoning is likely to become

Fill in the blank with correct word

At 6 months, Elena is able to sit up and has strong upper body strength, but she cannot yet walk. This illustrates the cephalocaudal principle

Indicate whether the statement is true or false