Astudent visits the beach during a very hot day. she steps on the sand and jumps because it is so hot. what type of heat transfer is demonstrated by the sand in this example?

Answer is: thermal conductuction.
Thermal conductuction is the transfer of heat through physical contact. Thermal conduction is the transfer of heat by microscopic collisions of particles. Heat spontaneously flows from a hotter to a colder body.
The process of heat conduction depends on four basic factors: the temperature gradient, the cross section of the materials involved, their path length and the properties of those materials.

The answer is d- principle of faunal succession.

B. nuclear reactions could first occur.