True or False: BOTH estrogen and testosterone play a role in the development of a fetus (baby in the womb). A) True
B) False

true. Estrogen causes eggs to mature in ovaries once a girl hits puberty. These are then released  during the menstrual cycle. Testosterone stimulates sperm production in males.

Explanation:

coal is not sustainable because it will one day run out.

answer: tributaries flow into rivers.

wetland is a biome that develops when the water gets accumulated in a land exhibiting a huge depression. these form either seasonally or permanently. the water in the wetland comes from rivers, lakes, ocean, flood, rain or other sources. the wetlands includes mangroves, marshes and peatland.

tributaries flow into the rivers develops a wetland because such water will get deposited in the depression and will restrict the original flow of tributary water. hence, water with low drainage current combines with the river water.