Edith uses 1 cube to build tower 1.

Edith uses 6 cubes to build tower 2. There are 5 cubes on the bottom layer.

(a) Write down the total number of cubes in tower 3.

19 cubes

Attached is an image of the three towers.

Step-by-step explanation;

To determine the total number of cubes in the tower 3

, we will resolve the number of cubes for each layer of tower 3;

According to the image attached;

First layer

Number of cubes = 1+3+5+3+1 = 13

Second layer

Number of cubes = 1+3+1 = 5

Third layer

Number of cubes = 1

So, the total number of cubes for the tower 3 is the sum of the cubes on the three layers.

Total number of cubes = 13+5+1  = 19 cubes

there has been genes found in the x chromosome of males that have been linked to [homo/hetero]sexuality. in addition to the reign of the x chromosome, a section of chromosome 8 has also been link to, "alot of ppl are so " these facts were proven true after a 2014 study of a gay male and his strait brother. according to newscientist.com,"chromosome 14 and is mainly active in the thyroid, but also the brain. called tshr, it makes a type of receptor protein that recognises and binds to a hormone that stimulates the thyroid. in this way, the gene plays an important role in controlling thyroid function. the fact that tshr seems to be involved in sexual orientation fits with evidence that thyroid function seems to be linked to sexuality."

in conclusion, "ppl are so gay" due to their genetics.

if you need , reply with more info. u.