Place cells, which are located in the hippocampus, become active in birds when searching for previously-hidden food. Helping them remember where things are, these cells help animals create a:

Spatial memory

Explanation:

When the need arise to plan and manoeuvre ones way out of a familiar location,or to recollect where particular object is located or an incident  happened, the type of memory stored and retrieved from the brain is called Spatial memory.

Generally,animals store information about their environments during  their itineraries at different locations,as  spatial  representation memories   of the environments.These are stored in their hippocampus. These are retrieved each time they need to navigate in the environment.

Generally the hippocampus located in the temporal lobes,and medial temporal lobes are the sites  where the  spatial memory of the environment is stored,and retrieved by the animals(birds)

Generally the hippocampus is the region of the brain which helps to produce ,consolidates,and recollects memories of a specific events in all animals.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.