Conduction is the transfer of heat between substances with different temperatures. Heat moves from the warmer to the cooler substance through direct contact.

True.

Explanation:

Conduction is a heat transfer method. The heat passes by direct contact between two objects. The heat will go from the object with the higher temperature to the one with the lowest one. We call this temperature gradient. If we analyze the molecular aspect of conduction, we can see that the molecules with higher temperatures have more energy so, they move more. These molecules will collide with the molecules of the other object transferring their energy. As a result, heat passes from the hottest object to the cooler one till the two substances are at the same temperature, there is thermal equilibrium.

In 1973,

The maximum length for the beak of birds was obserbed to be less than 12mm in length

While, at 1978, it was observed that some birds had beak length at 12mm.

From 1973 to 1978, it can be observed that short beaks bird was more in population than 1978.